There's an article doing the rounds called 12 things you only have to clean once a year.
I'll confess that some of these things I never clean at all! But some I do clean more often than once a year, so maybe I come out even...
The list is: light bulbs, carpet, window frames, the top kitchen drawer, washing machine, tumble dryer, gutters, outdoor furniture, curtains, garage, under heavy items and the pantry.
What do you hardly ever clean at your house?
I like cleaning up the pantry. I do it more often than once a year. You find things you forgot you bought and it reminds you to cook new things. It's also a reminder not to buy too much at the supermarket!