Switch it up lower the weight to like 205 and do 3 sets of 8 or something do something different if a certain program is not working switch it up i always do something like this when i bench.
Warm up 135x10
I work my way up the weights then go back down i usually would go down to 155 again but didnt feel like it. You could move to weighted dips if dips are getting to easy.
I think the best thing to do is change routine