2nd problem many, specially new racers are facing is that when they do spin, they tend to keep throttle down, but gear is perhaps 2nd or 3rd, there is no enough power in engine to keep tires spinning so car is about to be stalled.
How ever, many of new racers are using auto-clutch, which will engage clutch so that engine won't stall, but as you keep throttle down, clutch does not go to 100% but something between (maybe 50%) as it is trying to get car moving, here happens clutch burning and it does happen rather quickly with moderate rpm and throttle floored.
So make sure that you can spin tires with 1st gear even with hot tires if you are going to keep throttle floored when spinning and also make sure you shift down to 1st when spinning, or better yet is not to keep throttle floored when spinning.