Rear Brake issues at the track? alway need to be adjusted how to fix?

[TRD.RiC]

Hey guys. Everytime I go at the track I always have to reajust my rear brakes and im not talking about 1-3 click but more like 10 clicks everytimes. I was wondering if everybody had that problem of if sum1 understand what is happening in there. On my paseo I could adjust them 1-3 clicks and I think thats fine but on the yaris omg. I get at the track with the handbrake at 2-3 clicks and its holding and yesterday I did a fullday at the track and handbrake is wayyyyy looose.

I was thinking, on planes u have to put wire on bolts that can be adjusted so they dont move with the vibration in flight. I was wondering if that will work on brakes tough ??

Ill try it this week and im going back on a full lapping day on sunday we'll see how it goes!