if someone is doing this alot then it is sometimes worth making a near potsized raise and see if they carry on. You only need to be successful 50% of the time to turn a profit and if they do this alot then youll probably find them folding more like 80% of the time. Make sure you arent doing it against a station though. The other option is to stop cbetting some of the time when you miss and see if they adjust to that.