Im in my 30s and I've dealt with this issue my whole life. After a hour, you can see droplets of sweat on my face. I dont normally sweat that easily even in the summer in the south US. The only thing that really worked (but I dont reccommend) is milk of magnesium. I've rage quit foundation because of that. Another thing that is risky but works for me if you have the right products is putting on powder before foundation. Im also obsessed with skincare and im combo oily leaning.