I was going to post some comments about your bad night, but have not been able to get the time until now. I believe that today's bowlers are spoiled in a number of ways, and one of these is the practice of oiling immediately before leagues. Part of the reason for this is because they can with newer lane machines, part of it is necessary because of balls that soak up the oil. In the past, I know many houses oiled at most once per day, and some that oil as infrequently as once per week. It was much more common to see inverted conditions (dry inside, and oily outside). I am not saying that bowlers handled it any better, or complained any less, but you did see it more often. I was never one of the very top bowlers, but often had one of the better sets of the evening when these conditions occurred. There is an article in the March BTM about "grinders", and this is what is necessary in these cases. You also mention in this post about a previous week where you filled 33 frames, and IMO these 2 thoughts are what you need to focus on when conditions get tough. That is, you must focus on filling frames, and consider strikes a bonus. This is different that many of today's bowlers that figure they can cover any opens with more strikes. In contrast when condiitions get extremely tough you may need to sacrifice some carry potential (enty angle) to ensure easier spares. This reduces the number of splits and designer spares. One thing that many people fail to notice is that ALL good spare shooters leave easy spares. The thought process on the first ball beomes one of ensuring that you hit the head pin to give yourself a chance to leave a makable spare. (Much like the advise you might give beginners, and/or young bowlers). The general rules of thumb that I run through to try and find scoring options are: 1) change to less aggressive equipment, including your spare ball. Or, stay with the more aggressive, but try play a roll / hook out. 2) The 2 lines that are usually playable are extreme right, or extreme left. When playing the extreme right line, what I have found to be most critical is the point the ball exits the oil. If this is inconsistent, then I have often found the best bet is to simply play directly at the pocket with your spare ball. Unlike when the lanse have transitioned to very dry outside, ther often is not any oil this middle. Therefore, in this case the common practice of moving left and swinging the entire lane, will often result in high numbers of splits and difficult spares. Instead this is where I have playes a roll out, starting left and letting the ball swing to around 12 to 15, then rolling out as it transitions to the pocket. A final alternative that you might not consider. and that is trowing a straight ball from the left side. (This sometimes has the added advantage of being a psychological edge, because if you can score, it will bother some people).