I too have had the experience of cleaning ,only to find other nozzles become blocked. What happens is that crud is being smeared from one place to another. Power cleaning does the trick, but there must be some way of washing the print head and bed to clean things up with something less expensive than ink. Does anyone have experience with such a procedure?
If this type if blocking happens repeatedly it is also worthwhile to attempt to ascertain the cause, and to try to reduce the problem.
A few things to look for:
Dust in air, cotton fibres from cutter or original packing, insects , flakey coatings.
It would help a lot of people if manufacturers designed printers so that dust cannot fall into printing area and also provided fitting plastic dust covers with the printer.
On our part we have to look at sealed studios, air filters, electrostatic dust removers and vacuumed papers.
Any other suggestions?