canister filter hose cleaning - how ofter??

I never do... well at least I dont plan to yet. I guess some people may have the urge to clean their tubes if they are transparent. The FX5 comes with those gray rigid tubes so I cant clean what I cant see lol. When i used to use HOB filters the intake was clear so i used to scrub the gunk out with those weekly with filter brushes that look like baby bottle brushes. That is the slight OCD effect with transparent equipment

I have one transparent hose so I can see when the rest need to be cleaned. & yes I use cylindrical filter brushes. Work great but it's still a pain in the ***.