trash, burn, destroy ... and buy new ones.
My son would go through batting gloves within weeks. I tried the go cheap and replace often. For a couple years (couple year back) we would get them at DICKS with the warranty purchase, and had DICKS replace them for us :-). DICKS then outsourced their warranty claim process, made it too difficult to continue the annual batting glove replacement con with them. Last year, I splurged and got him Bruce Bolt gloves. He loves them and they lasted, and lasted ... great product but with a premium price.
When you start a new, the key is to get the sweaty batting gloves out of the bag so they can dry out after every use - after every game, practice or hitting session.
Luckily, my son had the habit of unpacking his bag from his younger ice hockey days.
may smelly batting gloves be your only set back this session !