Hello...i have a magnum nx and the brake was working flaelessly...suddenly my truck just won't brake as it used to do....i mean..the change was very noticeable..not gradual..

From one tank of nitro to another the brake changed...now it seem to be sluggish..it takes a lot of time to brake..before i could drift my truck now i'm lucky if i make it stop in less than ten feet...

What could be the roblem here? could it be just that the brake is wet or has some nitro on the disk?...i checked and could see nothing...i didn't move the brake linkage and i didn't crash

Hope you guys can help me sole the problem..thanks