TL;DR
A streak-free stainless sink comes from drying it, not from a better cleaner. Rinse, wash with a mild nonabrasive cleanser moving with the grain, rinse thoroughly, then wipe the whole basin dry with a towel. Chlorine bleach must never sit in a stainless sink, because chloride pits the surface permanently.
Why stainless looks bad even when it is clean
The dull white film in a stainless sink is usually mineral deposit from tap water, not dirt. Water evaporates, the calcium and magnesium it carried stay behind, and they build a haze that hides the metal underneath.
Stainless also carries a directional brushed finish. Fine parallel lines run across the basin, and cleaning across those lines drags residue into them instead of out.
Add the fact that a sink is where every greasy pan, coffee cup, and dirty sponge lands, and you have a fixture that looks neglected within days of being scrubbed. The fix is a short routine done often, rather than a hard scrub done rarely.
What is the best way to clean a stainless steel sink?
Rinse the basin, sprinkle a mild nonabrasive cleanser or a paste of baking soda and water, and work it with a soft sponge following the grain of the metal. Rinse completely so no residue is left, then dry the whole sink with a towel. Drying is what prevents spots.
The one thing that permanently damages stainless
Stainless resists rust because chromium in the alloy forms an invisible passive oxide layer on the surface. Chloride attacks that layer.
Chlorine bleach, and any cleaner containing chloride, breaks it down and leaves pits and rust-colored spots that cannot be polished out. Bleach left standing in a sink overnight is one of the most common ways a good sink is ruined.
The same applies to salt residue, to a wet cast iron pan left in the basin, and to steel wool, which leaves iron particles behind that rust and stain the stainless around them. Rubber mats and dish racks left permanently in place cause similar trouble, because they trap water and minerals underneath.
Source: stainless steel fabricator care and corrosion guidance
The routine, start to finish
Clear the sink and rinse it with hot water to wet the surface and carry off loose debris.
Apply your cleaner. Baking soda paste is the safest all-around option, and a nonabrasive cream cleanser works well on heavier grime. Skip scouring powder, steel wool, and green abrasive pads, which scratch across the grain.
Scrub with the grain in long strokes, including the sloped sides and the area around the drain flange where grime collects.
Rinse everything away. Residue left behind dries as a film and looks exactly like the spots you were trying to remove.
Dry the entire basin with a clean towel or microfiber cloth. This single step is the difference between a sink that gleams and one that looks chalky an hour later.
Handling water spots and mineral film
If drying alone is not keeping up, your water is hard. A dilute white vinegar rinse dissolves the mineral film: spray it on, let it sit two to three minutes, scrub lightly, then rinse thoroughly and dry.
Never combine vinegar with bleach, and do not leave acid sitting in the sink for long periods. Rinse it out completely when you are done.
For a faucet crusted in scale, the same approach works, and the full method is in removing hard water stains. If the water pressure has also dropped, the deposit has probably reached the screen, which is covered in cleaning the faucet aerator.
Rust spots, scratches, and dents
Orange spots in a stainless sink are almost never the sink rusting on its own. They come from iron transferred by a cast iron pan, a steel can left on the bottom, or steel wool fragments.
Scrub them with a baking soda paste and a soft cloth, moving with the grain. If they persist, a nonabrasive stainless cleaner made for the purpose usually finishes the job.
Fine scratches are unavoidable in a working sink and eventually blend into an overall patina. Deep scratches can sometimes be blended by a professional with abrasive pads matched to the finish, but that is a refinishing job, not a cleaning one. Dents from a dropped pot are permanent.
Finishing and protecting the surface
Once the sink is dry, a very small amount of mineral oil or a stainless polish buffed with the grain evens out the sheen and makes water bead instead of sheeting. Use almost none -- a greasy sink collects lint and looks worse.
This is the same trick that works on fingerprints on stainless fronts, and for the same reason.
Then keep up with it. Wiping the basin dry after the last dishes each night is the whole maintenance plan, as described in keeping the sink clean daily. Also pour hot water down the drain regularly, since the film that builds in the pipe is what causes why a kitchen drain smells.
FAQ
Can I use bleach in a stainless steel sink?
No. Chlorine bleach breaks down the passive layer that protects stainless and leaves permanent pits and rust-colored spots, especially when it sits in the basin. If bleach is spilled in the sink, rinse it out immediately with plenty of water. Use a mild cleanser or baking soda instead.
Is baking soda safe on a stainless sink?
Yes. Baking soda is a very mild abrasive that lifts grime without cutting the finish when used as a wet paste and worked with the grain. Avoid using it dry with heavy pressure, and avoid true scouring powders, which are far harsher.
Why does my sink have white streaks after I clean it?
Either mineral deposits from water that was left to air dry, or leftover cleaner that was not fully rinsed. Rinse more thoroughly, use less product, and dry the basin with a towel. If streaks return within a day, your water is hard and a periodic dilute vinegar rinse will help.
Should I use a sink grid or mat?
A grid that sits on small feet is helpful because it protects the bottom from pans and lets water flow underneath. A solid rubber mat that lies flat is a problem, since it traps water and minerals against the steel and can cause staining. Lift and rinse whatever you use regularly.
How do I get rid of rust spots in a stainless sink?
Scrub with a baking soda paste and a soft cloth, working with the grain, then rinse and dry. The rust is almost always iron transferred from another object rather than the sink itself, so remove the source too: no cast iron left sitting in the basin, no steel wool, no cans on the bottom.
How often should a kitchen sink be deep cleaned?
A quick rinse and towel dry belongs in the nightly routine, and a proper scrub with cleanser about once a week keeps film from building. Sinks in heavy use, or in homes with very hard water, benefit from a descaling rinse every few weeks on top of that.
Where this is one task among many, recurring house cleaning services take the broader load.
The sink sets the tone for how clean the whole kitchen reads, and it is also the fixture that slips first in a busy week. If you would rather have the room handled on a regular schedule, every home is different, so the real number depends on size, condition, and what you want covered. Get a quote and we will walk you through it.