I made kind of a stupid mistake, without thinking about it. Left a 10 strip in the bathroom while I showered, it was zipped closed though. There was moisture on the outside a little, not much. Is it likely to have degraded it at all? Thanks.
It's almost certainly fine. Whatever you do, don't take a huge dose just because you think it might have degraded. When you want to trip, just use a normal-sized dose.
There doesn't seem to be any place where the LSD would have leeched to, other than perhaps the inside surface of the baggie.. As for degrading into inactives like lumi or iso: maybe over time if kept too moist and exposed to other elements (of nature) - so I would dry it with some desiccant if you are still worried.
But doesn't sound very problematic... especially if the baggie is really closed then no problem at all (though all LDPE type plastic is a *little* permeable)