Should be fine to use and let dry outside. Make sure it's fully dry, let it sit for hours, make sure it doesn't smell (I let mine sit overnight, I pretreat for OT with PAM).
I only spray the enclosure (usually a tub) and that's it. Then, once dry and ready, I put in papertowels, water bowl, and a simple hide (usually a cardboard food box that can be tossed when done).
I believe you can spray the towels and hide if you want to but don't spray the water bowl. I don't bother with those, just the enclosure and I've (sadly) brought home a snake into QT that had mites, this killed them off just fine on it's own.
I would also wait to feed another week.
Hope that helps a little, good luck