Guess what? Two bras with Strappitys-Do-Da straps attached got washed! Now, this is the fastest way to void the Strappity-Do-Da guarantee, so DO NOT TRY THIS AT HOME. What happened is that the straps came out sparkling clean and totally intact.
Moral of the story: washing your Strappitys in warm soapy water, blotting with a towel, and letting them air dry (do not dangle near cats' paws nor baby's reach), will render your shoulder jewelry like new! So simple, so shiny.