i'm just getting back in the groove too. wed i disassembled my airbrush, every piece and cleaned it good. Vallejo seems to gunk it up over time more than Tamiya or MMA.
like anything else, the hardest part is sitting down and starting. artists fear the blank canvas, writers fear the blank page but a few brush strokes or words is all it takes. similar with us sand and glue to pieces together and it's an hour later before you know it.