Cleaning is the part of airbrushing that decides whether the tool still works next month, and it is where almost every airbrush that gets abandoned in a drawer went wrong. Dried acrylic is tenacious, it collects in places you cannot see, and the effects arrive gradually as a spray pattern that gets worse until the tool seems broken. The good news is that the routine is short and the equipment is cheap.
Between colours, and at the end
Between colours the job is small: empty the cup, flush cleaner through until it runs clear, wipe the needle tip. That takes under a minute and prevents the colour bleed and gradual build-up that ruin a session. At the end of a session the job is larger and involves backflushing, removing the needle, and cleaning the nozzle and cup properly. The distinction matters because painters who do the end-of-session clean between every colour give up on airbrushing, and painters who do the between-colours flush at the end of the day slowly destroy the tool.
What the accessories actually do
An airbrush cleaning pot is a sealed jar with a hole in the lid that you spray into; it contains the mist and the smell and stops you flushing cleaner across the desk. A set of small cleaning brushes reaches the cup and the nozzle threads. A needle-safe brush matters because a steel brush will scratch the needle and permanently spoil the spray pattern. Together these cost very little and are the difference between a routine you actually follow and one you avoid because it makes a mess.
What not to do
Do not soak an airbrush whole in aggressive solvent: it attacks the seals and the lubricant, and a leaking airbrush is worse than a dirty one. Do not force a stuck needle, which bends the tip and ends its useful life. Do not scrape the nozzle with anything metal. Most airbrushes that come apart badly do so because someone applied force where patience and a soak of the removable parts would have worked, and needles and nozzles are the parts that cost most to replace.
Questions people ask about airbrush cleaner
How often should I clean an airbrush?
A quick flush between colours and a full clean at the end of every session. Skipping the second is what gradually ruins the spray pattern.
What is an airbrush cleaning pot for?
Spraying cleaner into safely. It contains the mist and the smell instead of putting it across your desk, which is what makes the routine easy to stick to.
Can I soak my airbrush in cleaner?
Soak the removable parts, not the whole tool. Aggressive solvent attacks seals and lubricant, and a leaking airbrush is a worse problem than a dirty one.