Growing up I thought my mom was insane for washing aluminum foil, letting it dry, and then reusing it for something else. But now I see she was an environmentalist (of sorts) before it was even fashionable! Used aluminum foil that is not ripped or damaged in any way is perfectly fine once washed and can be used over and over again. There is absolutely no reason to toss a sheet of aluminum paper that was used once but is still in fine condition…unless of course it was wrapped around raw meat and then I wouldn’t recommend it! But if you can, try to use your aluminum foil more than once and keep some of it out of the trash (or recycling bin) for longer!