I do not run filter socks, as I struggle to keep NO3 and PO4 even detectable, my skimmer is after my fuge, and does get some bleed through of light from the 150-900w "tomato grow lights" (multiple tanks all sumps setup the same and all on same maintenance schedule)
Once a week: Empty cup, use toilet brush (never been in an actual toilet, but skimmate is worse lol) to clean the neck, place cup back on skimmer, dump again in 15 minutes when skimmer calms down from the gunk being kicked loose.
Every 6 months: Clean pump (if its needed, as cheato sometimes get through), vinegar bath (dang coralline), rodi rinse and back in it goes.
Every now and again, I notice that it just is not pulling like it should, and I have to take the pump off, clean the needle wheel, and put back together (cheato lol).