TL;DR
Clean a display cabinet one shelf at a time rather than emptying the whole thing, and spray the cloth instead of the glass so nothing runs onto a wooden frame or a gilded rim. The two risks in this job are breakage from handling and permanent damage to decorated edges, and both are handled by slowing down rather than by choosing a different product.
Why display cabinets need a different approach
A glass cabinet is mostly a dust barrier, and it works. The contents stay far cleaner than open shelving would, which is precisely why the cabinet gets cleaned so rarely that when it finally happens, the job feels enormous.
What accumulates is subtle. A thin film on the interior glass from ordinary air exchange each time the door opens. Fingerprints and hand oil on the exterior glass and handles. A soft dust layer on the shelves. And on the pieces themselves, a film that dulls glassware and, on silver, tarnish -- which is a chemical reaction with sulphur compounds in the air rather than dirt.
The other constraint is fragility. Everything in the cabinet is there because it is breakable, decorative, or both, and handling is where the risk sits.
Do one shelf at a time
This is the single most useful rule in the job.
Emptying an entire cabinet puts every fragile item on a table at once, creates a crowded surface where things get knocked, and makes it impossible to stop halfway through.
Instead: clear one shelf onto a padded surface -- a folded towel on a table -- clean that shelf and the glass around it, and put the contents straight back. Then move to the next.
Photograph each shelf before you clear it if the arrangement matters. It removes any question about how things went back.
Cleaning the glass
Spray the cloth, never the glass. This is the rule that protects the frame, and in a display cabinet the frame is usually wood, sometimes with a decorative finish.
Liquid sprayed onto a pane runs down to the bottom edge, where it sits in the joint between glass and wood. Over time that swells the wood, lifts veneer, and can dull a finish.
Use a streak-free glass solution and a clean microfibre cloth, then buff with a second dry cloth. Two cloths is the entire secret to streak-free glass. The wider technique is in the glass and mirror care guide.
Do the interior of the door glass while the shelf in front of it is empty. That is the surface people forget, and it is the one that shows.
If the cabinet has leaded, etched, or antique glass, keep the moisture to a minimum. Leaded panels have came joints that hold moisture, and antique glass may have a surface that reacts poorly to modern cleaners.
Gilded, painted, and mirrored edges
This is the part that causes irreversible damage.
Gilding -- a gold-coloured band on a mirror back, a shelf edge, or a piece of china -- is extremely thin and it comes off with abrasion or with the wrong chemistry. Never scrub it, never use an ammonia-based cleaner near it, and keep water off it.
Painted or transfer-decorated details on cabinet glass have the same vulnerability. Dry dusting only, and a dry cloth used gently.
Mirrored backs in a display cabinet have a silvered layer behind the glass that is damaged by moisture reaching the edges. Never let liquid run to the frame line on a mirror panel. Black spotting around a mirror's edge is that silvering failing, and it cannot be cleaned off.
The shelves themselves
Glass shelves come out in most cabinets, and cleaning them out of the unit is faster and safer.
Support a glass shelf from underneath when you lift it, and set it flat rather than leaning it against something. Most cracked shelves crack while leaning.
Wooden shelves take a barely damp cloth followed immediately by a dry one, and no polish -- polish builds up and transfers to whatever sits on it. Method by finish is in how to clean sealed wood furniture.
The contents
Each material has a limit, and the limits differ sharply.
Everyday glass takes warm water and a small amount of dish soap, washed one piece at a time with a towel in the bottom of the sink.
Crystal is softer than everyday glass and is damaged by heat, hard knocks, and dishwashers. Cloudiness from etching is permanent, unlike a hard water film which can be treated. The distinction and the handling are in the mistakes that ruin crystal glassware.
Silver tarnishes because of a reaction with airborne sulphur compounds. Polish it only when it needs it, since every polishing removes a little metal, and slow the return with proper storage rather than more frequent polishing -- see how to remove tarnish from silver safely.
Porcelain and china with gilded or hand-painted decoration is hand wash only, in lukewarm water, never in a dishwasher, and never soaked.
Anything antique, repaired, or of unknown material gets a dry dust and nothing else until you know what it is.
Dry everything completely before it goes back in a closed cabinet. Residual moisture in an enclosed space is how a musty smell starts.
How often should a display cabinet be cleaned?
Once or twice a year for a full shelf-by-shelf clean, which is enough for most cabinets because keeping the contents clean is what a glass enclosure is for. Wipe the exterior glass and handles monthly, since that is where fingerprints show and it takes two minutes.
If the cabinet is near a kitchen, a fireplace, or a frequently opened window, move to twice a year minimum, because airborne cooking residue and soot both find their way in around the door.
FAQ
How do you clean the inside of a glass display cabinet?
One shelf at a time. Clear a shelf onto a padded surface, spray glass cleaner onto a microfibre cloth rather than onto the glass, clean the interior panes and the shelf, buff with a second dry cloth, and put the contents straight back before moving on.
Why should you spray the cloth instead of the glass?
Because liquid sprayed onto a pane runs down to the bottom edge and sits in the joint between glass and frame. In a display cabinet that frame is usually wood, and repeated moisture there swells it, lifts veneer, and can damage the finish or a mirrored backing.
How do you clean a cabinet with gilded or painted glass?
Dry dusting only on the decorated areas. Gilding is extremely thin and comes off with abrasion or with ammonia-based cleaners. Keep water and cleaner away from gilded rims, painted transfers, and the edges of any mirrored panel.
Can you use glass cleaner on antique cabinet glass?
Be cautious. Leaded panels have joints that hold moisture, and antique or hand-blown glass can react poorly to modern cleaners. Use minimal moisture on a cloth, test in an inconspicuous area, and get specialist advice for anything valuable.
How often should a china cabinet be cleaned?
A full shelf-by-shelf clean once or twice a year is enough for most cabinets, since the enclosure keeps the contents clean. Wipe the exterior glass and handles monthly. Cabinets near a kitchen or fireplace need the deeper clean twice a year.
How do you clean glassware that has gone cloudy?
First determine whether it is a mineral film or etching. A film from hard water can often be reduced; etching is a permanent change to the glass surface and cannot be cleaned off. Holding the piece up to light and checking whether the cloudiness is even usually tells you which.
Every home is different, and a cabinet full of fragile pieces is one of the jobs people put off longest. Get a quote and we will walk you through it, or read more about house cleaning.
