If your brother is aware of the issue because numerous people, including you, have talked to him about it, and he’s showering almost as soon as he gets to your home, there might be some medical problem. Because he’s your brother and I presume you’re close (you love having him visit even though he stinks), you could try broaching the topic — compassionately! — from the angle that you’re concerned about his health rather than simply concerned about the aroma of your home. Has he talked to a doctor? Could the body odor be a symptom of something that needs medical attention?
Beyond that, there are some changes you can make at home to help with the stink. First, don’t have him remove his shoes. I mean, I get it, I’m a “take your shoes off at the door” kind of person, too, but there are exceptions, always (including when we’re having a get-together/party). Or, if you simply cannot handle shoes in your home, buy a pair of slippers (as a Christmas gift even!) for your brother to wear while he’s visiting so the foot stench fills the slippers and not your home. (Be aware though that you can’t control whether he actually keeps the slippers on.) I’d also get some candles. This is my very favorite one, especially for Christmastime. You can also do DIY home fresheners, by mixing different ingredients on the stove top or in the oven, Here’s one I found with a 30-second Google search, called “How to Get Rid of Home Odors Using Vanilla Extract.” Boom. You could also do lots of cooking. You know, fill your home with the scent of pies and roasts and chocolate chip cookies.
Finally, if all of that doesn’t work, there is one full-proof method that will do the trick: whiskey. It mixes well with the holidays and stinky family houseguests.
If you have a relationship/dating question I can help answer, you can send me your letters at firstname.lastname@example.org.