Thanks for the advice Tom. I was in a tree motion. I was thinking of trying a different one but I believe it is from the rubbing and sweat because I climbed in the saddle for 3 years before the issue worsened. I might try and borrow a buddies ergo to see what the results are but if it doesn’t work I’ll succumb to an itchy back once more and that’s not fun@Jem4417
YOu might try climbing the a harness from a different manufacturer. YOu might be having an allergic reaction to some material or fiber treatment in yours. Years ago when more leather was used for harnesses climbers would get rashes...especially in the summer. Thin shirts and lots of sweat Allergies can 'just happen' too.