I’ve been doing mine more often simply because I find it to be therapeutic and it gives me something pool related to tinker with. Especially seeing how dirty the cartridge is and rinsing it back to that clean, pure white again. With TFP water all the time I never have anything to “work on” so I’ve been cleaning the filter, just like once every 6 weeks or so - after start up this year and getting the pool cleared up I switched to a brand new cartridge in early May, then cleaned it at Father’s Day, then mid July, will do it again this week because we will be having a large party this weekend, and then that should get me until I close in Late October when I will clean it before putting it away for the year.
Just wanted to make sure that I’m not causing any huge amount of damage to my filter media by cleaning before I get to a 25% rise