Cleaning really depends on your landlord, some are stingy some are not. In my experiences the two things the stingy ones look at immediately:

1) Window of the oven (it is a bugger to clean)
2) they roll down the shutters and look on the inside of them, also areal bugger to clean (outside is easy, inside not so)

Biggest tip: Go to the Mieterverband (MV), and get a guy to come and do the control and hand-over with the landlord (and you present). Especially with language an issue. Its about 100Fr to be a member of the MV, then I think about another 100Fr to get dude to come, but he saves a fortune in peace of mind over being potentially taken advantage of, as well as a possible actual fortune of false claims against your depo.