One thing you CAN do with an HP wireless printer (and probably most other brands), is you can print a page remotely. All you need to do, is have cloud print running from your phone or laptop or whichever device you have with you at the time. Once a month, e-mail your printer a single page of something. It can be a coupon, or a picture, whatever you want, as long as it makes use of whichever cartridges are in the printer.
It'll print out that one page, every month. When you get home 8 months later you'll have 8 waste pieces of paper, and perfectly useable ink cartridges in your printer.
You'd also have to still have the electricity turned on.
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