I've already been welcomed to the "my costume caught fire" club by Chapman. Part of the club involves advice on how to insulate
The electronics are also all safe to go into the washing machine (though the dress is dry clean only satin because I'm a genious like that), so a little water won't cause major problems. A lot of water, the battery needs to come out but the chips will be fine.
Rymaus Liena “Ellie” Dax