>>sucks ink through the head when its docked and into a felt / sponge pad
IIRC they call that pad a tampon.
I had one printer that stopped after so many operations. The good old interweb thingmy told me it had a built in counter that required re-setting by a company trained technician. Further delving enabled me to wash out the tampon and re-set the counter.
I've a Canon now. Leaving it turned on has no point, as after a period of inactivity it'll do head-clean when asked to print.
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