This VERY GOOD video examines why wet belts fail, offers advice like: more frequent oil changes and why you should reduce wetbelt change periods.
https://www.youtube.com/watch?v=0SASSFjIt5I
A wetbelt is fitted to to the 1.8 engines after October 2007 instead of the lower timing chain, often forgotten, as people assume that the upper "drybelt" is all it has.
all the best.mark


