I’m inundated with these adds too. Fortunately I have not suffered from this for a long time, as I now apply roll on antiperspirant (Aldi’s cheapest!) You do need the rash to be pretty well cleared when you start, so this advice is no use if the rash is active! You just roll it under your boobs, in groin or other folds you sweat in. It really works. I am diabetic, and suffered a lot a couple of years ago. I heard the tip on the radio, and it’s been a game changer for me, not had it at all since. It has to be antiperspirant, not just deodorant. (I use Fussy deodorant underarm, I fell for that advert! 😁)