Printer only used monthly , perhaps when new then parking in the cart
dock at the side perhaps works, but not when years old.
A bit of a bind, but less of a bind than squirting air-duster etc to
unblock an ink cart etc etc. At the end of each session remove the
carts. Grab a couple of couple of large party balloons with the neck
cut off.
Stretch over the active face of each cart with a drop of
meths/denatured-alcahol in each balloon and store on a ledge with
balloons dangling.