We all know that it's a bad idea to let the ink completely run out before refilling, but at least in the set of ARC 250/251 cartridges I had, you had to let the printer tell you the cartridge was empty before they would reset. I didn't like them for this reason. My impression is that as a result of filling the cartridges when they're this low and the sponges have dried out that the refilled cartridges eventually don't supply sufficient ink over time leading to clogs in the print head and potentially burning out the print head. I don't know if I've stated this well. The main question is whether there's a refilling strategy / maintenance procedure to follow with ARC refillables to keep the cartridges healthy and prevent problems. I note that the person selling the ARC chips on eBay has a procedure for first use that appears to fool the printer into thinking the cartridges are empty when they're about 30% full.