[toni-a]

On my 3880 there is an option to do a test print where on a plain sheet of paper you get to see if all the cartridges are printing properly. If they are then "all the dots/lines" are connected. That is, there are no gaps in the dots for every ink color.


Every now and then there are gaps between the dots. When this happens, I just run the test again (maybe twice) and I usually find that all the dots get re-connected.


This is much cheaper than running a longer test print which obviously uses a lot more ink. However, when the quick test prints show that the heads are still a bit clogged, I just run a small sized (10x15cm) print and this also seems to unblock the heads.

In my case whatever print doesn't unlock the heads, only head cleaning does,

and many thanks for the advice I moved my printer away from direct sunlight, this should surely help