There is no issue with that at all. Just make sure that when you put them in that you want to run a few head cleanings to flush the head and capping assembly of ink. What I do is run 2 ink charges through the adjustment program. The ink charge is powerful compared to a regular head cleaning. Also do your daily maintenance as well.Just wanting to verify something real quick to make sure I read things right.
There should be no issue with putting in and leaving cleaning cartridges over night or even long term if I am not planning on printing.