Not using a dishwasher ok?

in theory it could possibly cause the unit to burn out but doubtful. it wouldnt hurt to just run it on a light cycle. the landlord certainly cannot hold you responsible if you do not run it and it does break.

one other thing if you do not use the dishwasher it will most likely start to smell after some time of no use.

you are talking about $4 dollars a month to run a dishwasher weekly.