I change my set every other day. I almost always get into trouble if I go for a third day. I keep detailed logs about where I put it so I rotate well. I still hit scar tissue areas on a frequent basis. It sucks.
https://forum.tudiabetes.org/topics/do-you-have-a-system-to-track
I get my husband to help me with putting it in places I can’t reach. I use Lidocaine cream so I have no feeling at all when I insert. I have been to a dermatologist, but he says there is nothing you can do about it topically. I do use CeraVe lotion all over after showering, and have noticed my skin is not as dry. I have come to realize I am definitely now one of those diabetics with slow healing. I would never get a CGMS because I don’t need another thing sticking into me making more holes and scars.