I switched by mistake from MK to PK on my 3880 printer (used Epson LFP without enough attention).
MK has black InkThrift CL and PK has UV45 that I used only once some months ago.
I switched back to MK (ITCL) and ran a nozzle test: no K at all!
It fully came back after two cleanings (from Epson Printer Utility 4), but I now wonder if some interaction between ITCL and UV45 can happen and cause clogs, and further if I should replace the UV45 ink with Piezoflush since I don't plan to use it soon.
In other words, can some UV45 ink in a PK cartridge sleeping for months be harmful in any way?
Thank you for your advices.