Wax it also, it dosent have to look great just have some uv protection. Paint whats rusty , tounge , wdh bars etc. Check the water in the batteries. Lube up what moves, pullies, stabs, stairs. Change the smoke battery ( if its not a 10 year). Check all the systems for leaks at the beginning of the season. I also loke to vacume out the outside vents for the fridge and hot water heater. I keep mine outside and uncovered, so you want to make sure nothing is in there. Going on that one, i spray 2x a year with ortho home defense max inside and out and keep poison blocks inside for mice.