Dexcom help

I've been type 1 diabetic for about 5 years now. I have used the dexcom since i was diagnosed. I loved the g5 and had little problems with it. However since switching to the g6 (about 2 years ago) ive had many more complications. One big problem im having is the sensor failing almost every time. I will get a notification that the sensor has issues and to wait a few hours then eventually it fails. At first it was only failing on my stomach. Ive asked my endo about it and she said i might have too much scar tissue in my abdomen and to try other sites. Now almost every time I put a sensor in, my sensor fails no matter what site I use. Has anyone else had this problem? Or possibly does anyone have suggestions on a different site i can use? I use my arms and back/hip mostly because i can't use my abdomin anymore. I also cant use my thighs because it causes baseball sized welts/bruises and my doctor told me not to use my legs because of this. Any suggestions or input would be helpful!