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For my 7xxx and 9xxx printers, I make my own cleaning solution and inject it into used carts. You could do the same.
I mixed some glycerin base that I had made to mix my own inks with (glycerin, distilled water, and Photo Flo - check Paul Roark's site for his Carbon something base.) with some rubbing alcohol and some ammonia.
I ran that through my system by running an "INIT" load (initialize printer - completely charge the lines from empty) about 5 times to completely clean out the lines and heads.
When you are ready to recharge it, just run "INIT" again (or it's equivalent) one time to charge the inks. Then run some 6 Color Purge prints (or however many inks you have) that you can get from inksupply.com They are basically files that you can resize that have large patches of each primary ink to print side by side on paper to clear the lines.
If you run too many cleaning cycles with the solution, you will fill up and have to empty the maintenance tank. On my large format printers, I can just pull them out, dump them, and refill with paper towels. No cost to any of this on large format.
You will have to map to equivalent commands/procedures on the 1270 and 2200. It has been many years since I used the small printers.
Good luck! Have fun too!