First I washed them in hot, soapy water with a little bleach cleaner poured in. This step is important because you want to kill any bacteria that can make your buttons smell like rotten milk. I know because I have some. They stink! At first I didn't use bleach; in my haste to make this great button display I cleaned with soapy water, dried and added buttons. Later when I opened one to use the buttons, a horrible plastic/rotten milk stench came out! Whew! Needless to say, those first ones have to be re-cleaned and hopefully airing out the buttons will take away the smell. One of my friends rinsed the bottles they collected, keeping the lids off, and the other friend didn't. By the time I got around to cleaning my huge stash of bottles out, I was very happy with my friend that rinsed them for me!
