75 degrees and have the heater on - ha ha! That is SOOO me! Every time I fast, I can be seen at work with a sweater and a blanket on at all times!
Don't judge yourself by what others are doing. Use as much cayenne as you feel you can handle. The more you use, the more cleansing you will get. But you also have to be careful not to use too much or you could detox too fast and send yourself into a healing crisis. I had fasted several times when I finally convinced my hubby to fast with me. He thought he was tough and could handle the same amount of cayenne as I could, but he ended up feeling so miserable that he quit before his target end date. So, build up to as much as you can handle - take it slow and listen to your body. It will tell you what it wants (or doesn't want).