SOLUTION #1: Protect your Undercarriage..
Indoor training is hot, sweaty, and more likely to lead to skin breakdown and saddle sores than outdoor riding. With less movement on the bike, less out of saddle time during a ride, extra care must be taken to avoid hot spots, saddle sores, and chafing. Wearing high quality shorts is a must, but even with the best chamois, one ProTour rider told us that, "A 2 hour Zwift race is harder on my 'undercarriage' than the Tour of Flanders!"
SILCA has attacked this problem with the creation of Harsh Conditions Chamois Cream, developed with Mad Alchemy. It is a 'just perfect' viscosity, cream that reduces the unwanted chaffing while controlling bacteria growth and protecting skin from breakdown during even the longest, sweatiest indoor sessions. Train smarter, not harder.