Clarella - really interesting to see that you also change every 3 days. I had been only lasting 2 1/2 days on one patch but have recently increased from 50 to 62.5 (37.5 plus a 25 Estradot patch) and today I have made the whole 3 days so hopefully I am on the right track. I found putting the patch on my thigh it lasted less time so I, like you, put it on my stomach below the pant line and alternate from side to side making sure I don't put them in the same place twice within a week. x