TL;DR
Sweep the mat dry first, wash it with mild soap and a soft brush, rinse until no foam is left, and let it dry completely before anyone bounces. The two things that go wrong are soap residue, which makes a mat genuinely slippery, and rust in the springs and frame, which is a structural problem rather than a cosmetic one.
Why the mat gets dirty the way it does
A trampoline mat is a woven polypropylene surface stretched flat and open to the sky. It collects everything that falls and nothing washes off it naturally, because rain passes straight through the weave rather than running across it.
The result is a slow buildup of pollen, leaf tannin, tree sap, bird droppings, and fine dust that grinds into the weave every time someone jumps. Left alone, that layer feeds mildew in the shaded parts of the mat and under the frame pads.
The mat itself is durable. What ages it is ultraviolet exposure and abrasion from the grit sitting in the weave, which is a good reason to wash it more often than most people do.
How do you clean a trampoline mat?
Sweep or brush the dry debris off, hose the mat down, wash it with warm water and a small amount of mild dish soap using a soft brush, rinse thoroughly until no suds remain, and let it dry completely in the sun. Never use bleach, solvents, or a pressure washer on the mat.
Step one: dry debris comes off first
Sweep the mat with a soft broom, working from the center outward. Get leaves, needles, seed pods, and grit off before water is involved, because wet debris smears into the weave and becomes much harder to remove.
Lift the frame pads while you are there. The area under the pads is where organic matter collects, stays damp, and grows mildew, and it is invisible until you look.
Clear the ground underneath the trampoline too. Leaf litter under the frame keeps everything above it damp and gives insects somewhere to live.
Step two: wash gently
Mix warm water with a small amount of mild dish soap. Wet the mat with a hose first so the solution spreads evenly.
Use a soft brush or a soft-bristled deck brush on a pole. A stiff brush frays the woven surface, and a frayed mat wears faster and can develop weak spots. Work in overlapping sections rather than scrubbing one patch hard.
For mildew or heavier staining, let the soapy solution dwell for 10 minutes rather than increasing the pressure. Dwell time is what does the work on a woven surface where a brush only touches the high points.
What not to use. No chlorine bleach, which degrades the polypropylene fibers and the stitching. No solvents. No abrasive pads. No pressure washer -- the spray forces water through the weave, can damage the stitching at the V-rings, and stresses the mat's edges where the load is carried.
Never mix cleaners. Do not combine any bleach product with an ammonia-based cleaner or with anything acidic. Use one product, rinse fully, and move on.
Step three: rinse until there is nothing left
This is the step that matters for safety, not just appearance.
Soap left in a trampoline mat makes the surface slick when it is damp, and slick is the last thing you want on a bouncing surface. Rinse the whole mat, top and underside, until the water runs completely clear and no foam appears when you brush a wet spot with your hand.
Then rinse once more. It is very hard to over-rinse a trampoline and very easy to under-rinse one.
Step four: dry it completely
Let the mat dry fully in the sun before anyone uses it. A damp mat is slippery and it is also where mildew restarts.
If you are storing the mat or the pads for a season, drying matters even more. Rolled or folded fabric put away damp will mildew from the inside, the same failure that ruins cushions, tarps, and umbrella canopies. The general principle is covered in fabric and textile care and cleaning and storing a dirty tarp.
Springs, frame, and the rust question
The springs are the part that actually determines whether the trampoline is safe, and they are the part nobody inspects.
Wipe the springs and dry them. Water sitting in a coil rusts it from inside the coil where you cannot see. A wipe-down and a dry after washing is worth the effort.
Inspect each spring. Look for stretched springs that no longer close fully, rust that has pitted the wire, and hooks that have opened. A handful of tired springs makes the mat bounce unevenly, which is a fall risk toward the edge.
Check the V-rings and the mat stitching. The triangular rings where springs attach carry the entire load. Frayed stitching there is a replace-the-mat signal, not a repair.
Look at the frame. Surface rust on a galvanized frame can be brushed back and treated with a rust-inhibiting outdoor paint. Rust that has gone through the tube wall means the frame section needs replacing.
Tighten the hardware and confirm the frame joints are fully seated and pinned.
How often, and off-season storage
Wash the mat a few times a season, more if the trampoline sits under trees. A quick sweep and rinse whenever debris builds up costs minutes and prevents the ground-in staining that takes real work.
For the off season, the choice is between covering it and dismantling it. If you cover it, use a breathable cover on a fully dry mat, since a sealed cover over damp fabric holds moisture against it. If you take it down, clean and dry every component and store it somewhere dry rather than on a cold concrete floor where condensation collects. The rest of the yard follows similar seasonal logic in how to clean a backyard playset, outdoor equipment cleaning, and patio and outdoor living cleaning.
FAQ
Can I use bleach on a trampoline mat?
No. Chlorine bleach degrades the woven polypropylene and weakens the stitching that carries the load, and the damage is not visible until something fails. Mild dish soap with a soft brush and a long dwell handles mildew and staining without compromising the mat.
Can you pressure wash a trampoline?
It is not recommended. The spray forces water through the weave, stresses the stitching at the spring attachment points, and can damage the mat's edges where the load is carried. A garden hose, mild soap, and a soft brush achieve the same result without the risk.
Why is my trampoline slippery after cleaning?
Almost always leftover soap residue. Soap in the weave makes the surface slick whenever it is damp, which is a real fall hazard. Rinse the mat, top and underside, until the water runs completely clear and no foam appears when you rub a wet section by hand.
How do I get mildew off a trampoline mat?
Wash with mild soapy water and let it dwell about 10 minutes rather than scrubbing harder, then rinse thoroughly and dry in full sun. Lift the frame pads and clean underneath them too, since that shaded, damp area is usually where the growth is worst.
How often should a trampoline be cleaned?
A few times a season for most, and more often if it sits under trees. A quick sweep and hose rinse whenever debris builds up prevents the ground-in staining and grit abrasion that shortens mat life. A full wash at the start and end of the season is a sensible rhythm.
What should I inspect while cleaning the trampoline?
Check springs for stretch, rust pitting, and opened hooks, look closely at the V-rings and stitching where the mat attaches, tighten frame hardware, look for rust through the frame tubing, check the net for tears and a working closure, and check the frame pads for cracking.
Should I take my trampoline down for winter?
Either taking it down or covering it works, provided everything is dry. If you dismantle it, clean and fully dry each component and store it off a cold concrete floor where condensation collects. If you leave it up, use a breathable cover, and remove accumulated snow load rather than letting it sit.
Trampoline size, how long the buildup has sat, and the condition of the springs, mat, and net all change what is worth doing, and worn components are a replacement question rather than a cleaning one. Get a quote and we will look at yours.
