Almost all damage done to wood furniture during cleaning comes from one of three things: too much water, the wrong product, or a cloth that was not clean. None of them looks like damage on the day.
Before anything else, find out what finish you are dealing with, because the correct method is completely different for each.
Identify the finish first
Find an inconspicuous spot, the underside or the back edge, and put a single drop of water on it. Leave it two minutes, then wipe.
- The water beads and wipes away leaving nothing. A film finish: lacquer, polyurethane or varnish. The wood is sealed under a plastic layer.
- The water darkens the spot, and the spot fades as it dries. A penetrating finish: a hardwax oil, tung oil or danish oil. The wood is protected from within, not coated.
- The water soaks in and the mark stays. Unfinished, or a finish that has failed. Do not wet-clean it at all until it is refinished.
If the result is ambiguous, treat the piece as an oil finish and use less water. That is the cautious direction: an oil finish cleaned like a film finish gets stripped, while a film finish cleaned like an oil finish simply gets cleaned more slowly. If you do not know what a piece was finished with, the maker or seller can tell you, and it is worth asking before the first spill rather than after.
Routine cleaning, both finishes
Dust weekly with a dry or very slightly damp microfiber cloth. Dust is not cosmetic, it is abrasive. Dragging a dry duster across a dusty surface repeatedly is what produces the fine scratch haze that makes an older table look dull, and it is entirely avoidable.
Wipe along the grain, not across it. If there is grit, lift it off rather than dragging it.
Cleaning a film finish: lacquer, polyurethane, varnish
- Dust first.
- Mix a few drops of dish soap into warm water.
- Dampen a cloth and wring it until it is barely damp. Not wet. Not dripping.
- Wipe along the grain.
- Dry immediately with a second clean, dry cloth.
Never leave water standing. A film finish protects the wood only where the film is intact, and every edge, joint and screw hole is a place where it is not.
Cleaning an oil finish
Same method, less water, and dry sooner. A barely damp cloth, along the grain, dried immediately.
The advantage of an oil finish is that a mark is repairable in place. The requirement is that you top it up.
Re-oiling, and how often
A dining table with an oil finish wants re-oiling roughly once a year. A side table is more like every two or three years. Any single spot that starts to look dry or pale can be done on its own, without redoing the whole surface, which is the practical advantage of this kind of finish.
The method: clean the surface, let it dry fully, apply a thin coat of the same oil the piece was finished with, leave it ten minutes, then wipe off everything that has not soaked in. The wipe-off step is not optional. Oil left sitting on the surface stays tacky for weeks.
If you do not know which oil was used, ask the maker before guessing. Different penetrating oils cure differently, and layering an incompatible one over another is how a surface ends up permanently uneven.
Dispose of oily rags properly. Cloths soaked in a drying oil generate heat as they cure and have genuinely started fires. Spread them flat outdoors to dry completely, or put them in water in a sealed metal container, before binning them.
What never to use, and why
Silicone-based spray polish. This is the product that ruins the most furniture. It builds a slick layer that traps dust, looks cloudy over time, and, crucially, makes the surface impossible to refinish without stripping, because nothing will bond to silicone. Once a piece has had years of spray polish it is a real job to undo.
All-purpose cleaners and disinfectant sprays. Most are alkaline or contain solvents. On an oil finish they strip it. On a film finish they dull it.
Vinegar. Popular online, and it is an acid. It etches some finishes and will lift others over repeated use.
Ammonia and window cleaner. Ammonia darkens oak dramatically, it is literally a technique for staining oak, and it clouds lacquer.
Baby wipes. They contain surfactants and preservatives that leave a residue and, over time, soften some finishes.
Steam cleaners, magic erasers, scouring pads. A melamine foam eraser is an abrasive. It works by sanding. On a finished surface it dulls the sheen in exactly the patch you cleaned.
Specific problems
Sticky residue. A cloth barely damp with warm soapy water, then patience. If that fails, a drop of mineral spirits on a cloth for a film finish. For an oil finish, clean the area and re-oil it afterward.
Grease around handles and kitchen surfaces. Warm water with a little dish soap, worked gently, dried at once. This is the one place where a slightly stronger dilution is justified.
Candle wax. Harden it with an ice cube in a bag, then lift the bulk with a plastic card, never metal. Remove the film with a hairdryer on low and a paper towel to absorb it.
Ink. On a film finish, act fast with a barely damp cloth. On an oil finish, ink often penetrates the timber and needs light sanding and re-oiling. Both are easier the same day than the next week.
Mold on stored furniture. Take it outside. Brush off dry with a soft brush, wipe with a cloth damp with equal parts water and rubbing alcohol, dry thoroughly, and fix the humidity problem that caused it, otherwise it comes back.
Rings, heat marks and scratches
These are common enough to have their own guide. How to remove water rings, heat marks and scratches covers each one with the method that matches the finish.
The habits that matter more than any product
- Coasters and mats. Unglamorous, and they prevent most of the damage in this article.
- Never put a hot pan directly on timber, whatever the finish.
- Wipe spills within minutes, not hours. Water is only a problem when it sits.
- Keep the room between 35 and 55 percent relative humidity. More on that in the solid wood care guide.
- Lift furniture, never drag it.
Common questions
How do you clean a hardwood table?
Dust it first with a dry or barely damp microfiber cloth, then wipe along the grain with a cloth wrung out in warm water with a few drops of dish soap, and dry it immediately with a second cloth. Use less water on an oil finish than on a film finish, and never leave water standing on either.
How do you know if a table has an oil or film finish?
Put one drop of water on an out-of-sight area and leave it two minutes. A film finish makes the water bead and leaves no mark. An oil finish darkens where the drop sat, and the mark fades as it dries. If the water soaks in and the mark stays, the piece is unfinished or the finish has failed.
Can you use furniture polish on solid wood?
No. Silicone-based spray polish builds a layer that traps dust, clouds over time, and makes the surface impossible to refinish without stripping, because nothing bonds to silicone. It damages both finish types and it is the single product that ruins the most wood furniture.
How often should an oiled table be re-oiled?
A dining table roughly once a year, a side table every two or three years. Individual dry or pale patches can be re-oiled on their own without redoing the whole surface, so the cadence depends on use rather than the calendar.
For how the finishes differ in the first place, see wood finishes explained. See the tables, or the dining pieces.