I usually score in the 170s, then every once in a while I just seem to lose IQ but only in one section. In the last PT, I scored a 167 but with -0 -2 -0 in sections 2, 3, and 4. But I got a -8 in the first section which was a RC. Why does this happen? In the next one I got a -0 but it wasn't any easier I just hit a wall in the first one. Any advice? Some useful warm up or something that wouldn't drain me before I begin but would help this drop on the first section

Thanks