I've picked up a couple of useful cases at Harbor Freight, my favorite is a rolling toolcase with a telescoping handle. It's meant for tools but fits my Brother perfectly. Unfortunately, I haven't seen anything I thought would be useful lately, although come to think of it, I haven't been to HF in about 9 months. 🤔
Have you tried placing baking soda or charcoal inside for a week or so? Maybe leave it sitting open in the sun for a couple of days?