I have been building a new green house which has involved quite a few glass cuts. I have been using Virex 6 wheel one but it seems to stop cutting after 3 or 4 cuts (got a lot of broken glass now!) Changing the wheel solves it till that wheel gives up and so on. On wheel 5 now! I have almost finished now, but would like some suggestions for a decent one to replace it please. Using oil on the wheel by the way.