I purchased your epson refillable cartridges and your inkthrift DB ink, within 2000 pages of installing the black cartridge my print head is completely clogged and will no longer print. I have 4 of these printers and have printed cumulatively about 50,000 pages with them and have never experienced a clog until I switched to your ink. I don’t know what can be done to unclog it but if I have to perform maintenance every 2000 pages the cost savings on the ink isn’t worth it. This printer is used at least 3 times a week and was in the middle of a 400 page print job when it clogged. I would like some advice on unclogging it so I am not out a 300.00 printer as well as the money wasted on the ink and cartridges.