While cleaning, I found an unused "HP 92281C Cleaning Cartridge Kit", which is a
cartridge for an HP 9144 / 9145 (or, possibly any QIC drive?), with a bottle of cleaning fluid (containing isopropyl alcohol).
Like an old-fashioned VHS cleaning tape, you apply the liquid to a sponge-like area on the cartridge, and insert it into the drive to clean the heads.
(I've never used one, but it's in original box and has instructions.)
Free for pickup in Cupertino.
Feliz Ano Novo!
(Portugese... I found this during cleaning/packing in preparation for tearing up kitchen to repair water damage, and remodel ... our contractor is from Portugal )