Mermaid562

Hello. I’ve been having so much trouble getting white residue off of my silicone molds even after re washing a couple of times. I’ve tried vinegar soaks, Dawn hot water soak, wiping with 99% rubbing alcohol, seems like nothing works. Also, what is the quickest way to dry them? I used to use the laundry dryer. I heard the oven is good but not sure of degrees and how long. Thanks!