HaHaHaHaHaaa Oh my god, how bad are his night sweats that he's having the same mildew, mold, and body soils buildup in his blanket that people who don't know how to treat their sweaty gym clothes have?
Just don't leave it lying in a rumpled heap after you soaked it with sweat, your "most amazing washer and dryer with more settings than I've ever seen" probably has a 'Soak' setting that you can use and pour some vinegar in with before washing, or they make specific detergent for gym clothes that you should probably buy anyway since this is a recurring issue with you.
Of course Phil decides to spend $50 on a new blanket instead of $5 on some vinegar and appropriate detergent. Like how he decided to spend hundreds buying foam mats for his whole house on his credit card instead of spending $10 to buy a pair of Slides with cushy foam soles to wear as house slippers.
What a disgusting fat pig