What is the best way to make sure I get my deposit back when I move out?Beta*

Most of it comes down to move-in day. Check the inventory line by line and write down everything it misses. Take dated photos and video of every room, including inside cupboards, the oven, windows, mattresses and carpets. Send it all to the landlord or agent by email within a few days, so there is a dated record that they received it. Report any repairs in writing during the tenancy. When you leave, clean properly, take the same photos again and return all the keys. A deposit dispute is decided on written evidence, and evidence gathered at the start is what usually wins it.

On this site: Moving in audit

Sources: Shelter: getting your deposit back