Bought my bottle of isopropyl alchohol on Saturday last and tackled the windscreen problem as advised. Did not make any difference whatsoever, in fact made the problem worse. Should have drunk the alchohol instead. Seems like the only solution is to replace it. The only problem in South Africa is the availablility and will likely have to be a BMW replacement windscreen from Germany. Shudder to think what the price will be. Has there been a thread concerning removing the windscreen?