Care of a new airbrush

[Ashlandchris]

Just treated myself to a new iwata brush and wondered what the best care programme for it would be? Usually with my current cheap brushes I run water through after every colour change, but I've found that paint still builds up inside and I stripped it down yesterday to clean - want to try to avoid this build up on the new one.
I only use water based (createx and fascolor) paint.
I've been trawling threads on here and found differing advice about whether to use specific cleaner, window cleaner etc. Ive also heard differing advice about using nylon brush sets - any advice on this?

So. To look after a lovely new airbrush, what do you chaps do with your pride and joys?

Merry Christmas to all of you, and thanks