Ink cartridge leak for printer?

i dont remember exactly but im pretty sure i refilled my black ink for my printer and only used it for a few times before school ended. i havent used it for the whole summer, now that im bak in school i tried printing yesterday but it says its low on ink now. i opened the printer and checked the cartridges and it seems the black has leaked a little, just a little, not like its dripping. is that maybe the cause for the loss of ink? im think randomly but was it the summer's heat that caused it as well?Ink cartridge leak for printer?
It's possible. Maybe the black cartridge is not refilled well and most of the ink is absorbed by the wastepad. Be careful if the wastepad is too moist to absorb any ink further.

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