My brother in law found a featherweight in the addic of my in-laws house (we bought the house when they passed) one of two things in the attic (why?). It smells so moldy! Case is in the garage, machine is in the basement even the machine smells things up. I’ve tried everything. Baking soda, sealed in a bag of cat litter, washed everything. Book and attachments even smell! Any other ideas to clean up the smell???