Airbrush cleaning kit / supplies

I keep two bottles of "thinner" on my bench- mineral spirits for when I use enamel, and isopropyl for when I use acrylics.  I keep a homemade cleaning chamber on the bench.  This is a half pint jar with a plastic lid on it. I drilled a hole in the lid for a short piece of plastic plumbing pipe (half inch?), glued to the cap. On top of the length of pipe is a 45 degree fitting, so I do not need to aim the nozzle straight down.  I spray the thinner into the nozzle and the jar collects the old thinner.

I keep a box of kleenex handy to daub the bottom of the pickup tube (I use a suction feed airbrush). I can see by the color of the daubs whether the pickup tube is clean of paint.

I do not run anything through the passages of the brush.  If I disassemble and clean the only thing that touches the insides of airbrush parts is to occasionally wipe the needle with the kleenex, or to wipe out the front of the nozzle with a q-tip soaked in thinner.

When changing paint colors I only run thinner through the brush and backflush.  Only dis-assemble when done for the day or with that model.

You will use a lot of paper toweling, Kleenex, and q-tips, so keep a good supply on hand.

I would listen to Don as he is a master. I have used tons of his advice and have never gone wrong. One thing I use though and have done for years with my Iwata airbrush is after im done I will run straight ammonia through it or 90% isopropyl. Cleans it perfectly and has never caused any damage. Some will cringe at my method but hey like I said it works for me with no problems in years. But do what you feel comfortable with and what you find works. I would skip on the window washer fluid though.

I was kinda of wary of some using windex/window cleaner myself. What about using nail polish cleaner to clean the needles and other parts as such with a q-tip / paper towel or tissues? I have heard using straight ammonia or 90% isopropyl works wonders.

I would be careful with nail polish cleaner.  Nail polishes used to be lacquer (this may have changed).  Lacquer thinner is hell on most plastics. For metal parts it is okay, but do not use it on plastic. Also, you may find hardware store lacquer thinner cheaper than the nail polish thinner. I do use lacquer thinner on things like needles, or on the glass airbrush jars for really tough, old paint deposits.  Unlike generic paint thinner, the generic laquer thinners still seem to be okay.