I haven't been at this a year but like you I have been through 1 print head myself due to my rookieness and lack of knowledge.
I do do alot of customer prints so the printer sits idle most of the week. But after having to replace that print head I do things a tad differently than before.
I have 2 scheduled head cleanings that run automatically 2x per day. I do a full print with WUB every other day at least. I don't print on shirts but I print on a 8.5x11 sheet of paper. I got tired of wasting money on shirts, the fact that I waste ink is bad enough. I have a png file that I have setup that is pretty much a 8x10 block of white, with the other 4 colors as well. I run it through my dark shirt queue so it print UB as well as highlight white and the colors.
I clean the capping station once a day (generally every couple days anyways). Every Sunday I do a more thorough cleaning of the capping station by removing it and taking it to the sink and completely cleaning it.I do need to get another capping station.
Right now with the rain my humidity is around 55 - 65% so my humidifier does not run to often.
I myself probably don't clean like i should but it currently does the trick. I also run a nozzle check every few days just to make sure. I replaced my print head at the beginning of the year and so far still have all nozzles firing so I must be doing something right.
The only thing I really find irritating is the white ink settling. Once a week or before I do a customer print I have to shake the cartridges and then pull the ink through to get good white ink going solid again. I am currently playing around with some 12 volt DC vibrating motors to see if I can get a scheduled vibration of the lines, bottles and cartridges to avoid doing that.
Putting cleaning cartridges in every night honestly seems like more work than just running the swab and cleaning fluid around the capping station. Takes like me like 2 mintues to do it and leave some fluid in it. I don't clean the encoder strip but once a week if that, i don't do enough printing to get the strip that dirty.
I think the most important thing as far as daily is head clean and capping station clean. I know I am about to order 4 or 5 of the felt tops for it as no matter how clean i get it now the ink doesn't seam to get sucked down like it did originally. At $12 a pop seems like a no brainer to replace it a couple times a year.
Sorry for the long write up.