You can find a checklist „Was müssen Mieter reinigen?“ on the website of the Swiss tenants association. You will find a list of all obejcts you should clean and at most have to replace. You have to remove decorations and their residuals (tapes, hooks on doors or walls, nails and screws and the descaling of water jets). Broken blinds, seals, shower hoses and shower heads should be repaired by the tenant. Normally you should only follow the directions noted in the checklist, however, if other assignements have been fixed in the rental contract, you should contact the landlord.