Remove musty smell from an old quilt?
You can't wash itYou'll ruin itNo water at allAsk anyone who has washed a man's tie what happened to the tieJust air it outI'd do it in the sun on a windy dayThe sun will do NO harm for 4-6 hoursThe other option is to ship it to a fabric conservator for complete repair.
You can't put foil in/on electrical appliances like thatTo make soemthing like the GF grill easier to grill you just put a wet wash cloth, sponge, or wad of paper towels inside, unplug and as you eat it will steam everything off and make it all just wipe off.
