Having recently started airbrushing with a Sparmax Arisma Kit using the Sparmax 4 airbrush I can happily say that Mr Muscle Glass cleaner (green) is a great and far cheaper alternative for cleaning the Airbrush. Saying that, it is a branded product, so today I bought the Aldi equivalent for £0.75p to see if more money could be saved as this is over half the price of Mr Muscle.
I will report back after I've got some worthwhile feedback, it might be a few weeks as I don't get to do loads. Please feel free to give any feedback if you get to try before me.