Stinks, they do. Can someone help with cleaning golf shoes?

my wife actually puts fabric softner sheets in my shoes and boots, and it helps alot

Regis Philbin had good advice on this kind of question.

His advice comes from a gentleman’s gentleman, one of the personal valets who can be employed by active men: he recommends a weak ammonia solution as a rinse out inside the shoes, including expensive leather shoes, on occasion.

I bet the insole can be removed. Peel that stinky thing out and replace it! You can find shoe insoles at sporting goods stores and many shoe stores. Then make him put foot powder in his shoes every time he wears them. I play sports and this really makes a big difference in keeping shoe stink at a minimum.