Micky_macca, this is a good subject to bring up. I myself am finding the same problem with the PBA that I am currently using. I have had the PBA for about a year now and when I bought the ball it turned like it should (a lot). However as time has gone by the ball has been losing its turn. :?
In all the time I have had the ball I have been cleaning it with Isocol after bowling through the week and even when I go to have practice I clean it after I have finished practice. Recently I purchased a ball cleaner called Ultra Clean which is a ball cleaner sold by AMF centres and some non AMF centres. I don't know if it is shycological or what but I feel that the Ultra Clean did less for my ball than the Isocol. Since I have gone back to using Isocol I feel that my game has picked back up.
Further to using Isocol I have soaked the ball in warm to hot water and it does work for a while but I don't think it gets the oil that is deep within the ball. Before I had heard about this method I was a bit sceptical about the method but after talking to a accredited ball driller I was told that the core of the ball is non pourus. This means that the core of the ball will not soak up any water. 8)
Recently, I participated in the Melbourne Tenpin Cup and the person who runs the proshop there (Bowlers World) has a machine that he got from America. Its a machine where by you put the ball in it and it turns the ball and at the same time blows warm air around the ball drawing the oil out of the ball.
Also after going for a practice game at Bridge Bowl at Murray Bridge the other day I was talking to a worker there about the same thing. He told me that he puts his ball about half a meter in front of a small foot heater. By putting the ball so far away from the heater it allows the ball to heat up but not get to a stage where it may do too much damage to it. When the oil starts to come out of the ball, all that needs to be done is wipe it off. 8)
Im not ball driller or anything but further to the above, it is probably recommended to get the ball resurfaced once and a while to try and bring the ball back to a new condition.:idea: