Step 5: Load in Ants, Start Dual-Life
Your arm hair gives them a good substrate to crawl in and hold on to, and prevents them from flying all over the place when you move your arms.
Try to keep it on for at least 24 hours. Granted, because your arm is a strange environment and I didn't load in the whole colony, you won't really be experiencing typical life of ants, but it is a unique, interesting experience. One thing I noticed was that I would get phantom ant-crawly feelings on my opposite arm!