Don't think about making your own. I also don't recommend going past the warning without replacing them and I don't recommend cleaning them. If you try to clean them, some of them will end up being thinner than they start out and unless they are in contact with the ones above and below, they will not allow ink to flow between them.
I only know about Canon and I buy them from my local authorized dealer for $7. I have seen them on eBay and other websites for double that amount which is still a bargain. What printer do you need them for?
I once opened up an i960 that had its waste ink tank full. I underestimated how messy it would be. Both my hands looked like painted by black paint. Anyway, Ghwellsjr wasn't here to give his suggestion (or I wasn't here to see his suggestion) I washed the pads thoroughly, dried them, stacked them back together and reused them. I did not check the thickness before putting them back in. I did try to dry them well and it took me a couple of days to do that. Fortunately it still worked.
But I am not trying to tell you to go ahead to wash yours and reuse them. It will be a lot easier to just put new ones in. If I had waste ink tank full problem again (none so far) I probably be more happy to replace them unless I can't find them quickly.
to ghwellsjr, it is an hp deskjet D2360. These are considered disposable printers, but, with little or nothing erlse to do
i thought it would be a nice project to do.
I have no idea what the absorbent pads in an HP will look like but if they are anything like my Canons, you will see that they are different wierd shapes, different thicknesses, and even made of different materials. If you can't locate replacement pads, I would opt for cleaning the existing ones. On second thought, I'd just throw the printer away.
I made a replacement mat for a Canon BC6200 some time ago. It was comprised of 3 or 4 layers of Greenhouse Capilliary Matting type felt, combined together to equate to the original thickness and shape . Capillary matting is usually green or charcoal in colour and obtainable from your local friendly Garden Center at reasonable cost.
It had a very similar texture , consistency and action as the mat it replaced. The Original mat (which was polythene backed on its bottom surface) was used as a template , worked quite well.
Trying to rinse out the original is a virtual impossibility I found.
I read a post several years ago by a very helpful person on a printer newsgroup that described making replacement pads from the artificial hair (jute?) carpet padding. He suggested picking up scraps from carpet layers. Report was that it worked quite well.