^Be careful which hand warmers you use. I got some crappy ones at a sporting goods store when I was practicing and it only got the urine up to 94 tops even when crotched. The ones that come with Quick Fix (heat factory) are really good and they got it up to like 99-100 when I tested it only using the heat pad (no microwave).

Just make sure you get a few heat pads and practice once or twice. I also got an electric thermometer to see how accurate the strip is. The headshops that sell Quick Fix will sometimes have few extra heatpacks for sale, otherwise you can order them online if you have time!

Peace,
lampost