This bed smells of mushrooms.

If the musty smell is serious and there are a lot of musty spots, then you should take the quilt apart and wash it, and expose it to the sun with cotton wool.

You can also put the remaining white wine or medical alcohol in the watering can, spray it a few times in the smelly place, and then open the cupboard door and window to ensure indoor ventilation. With the volatilization of alcohol, the musty smell will mostly dissipate.