My dermatologist recommended 1.get out of those sweaty shorts ASAP! 2.when you bathe, use "antibacterial" soap (like Dial soap) on the chamois contact part of your butt. & 3.use "PFB Vanish"'lotion after bathing on the pimpley areas.
4.my own two bits is avoid shaving the chamois contact area, better to trim hair with scissors, clippers or waxing.
Tokie