Chafing Issues Beyond Just Lube?

So, I’m dealing with chafing that isn’t your typical ‘needs more lube around the balls’ issue. After wearing my CB-6000 for a reasonable amount of time, masturbation becomes very painful because the skin gets rubbed raw even after short play sessions. I recently unlocked last Saturday after about five days in lock-up and started pleasuring myself again—but had to stop due to the discomfort. Today feels better enough to try it once more (what a tease!), but now I’m anxious about putting the device back on! Any advice or suggestions?