The surface of the dresser is mouldy
Wet weather can cause deterioration, but without organic compounds in front, it will not mildew. This is the reason why the surface is moldy (without mildew inside).Clean organic compounds, remove the moldy foundation, just fine.
Mildew, first of all organic matter, and then deterioration, will be moldy.
You can use "jiugu natamax" kill natamax in mold, mildew and have waterproof effect. Usually do ventilation work, so that indoor temperature, humidity, etc., can not reach the conditions of mold breeding!