@Robyn Sparkles 13 by the way, you didn't say if the container was closed or not. It does need some ventilation and air exchange, so do not totally close the lid. If it's an old one that you can poke holes in, that would work. If you don't want to ruin a good one, at least keep the lid partially vented.
editing to add - or better yet, just cover it with plastic wrap and poke some small holes in the plastic.
editing to add - or better yet, just cover it with plastic wrap and poke some small holes in the plastic.