I once owned four, Epson 4900 printers. That model is legendary for being the most-clog prone printer ever made.
My main de-clogging method was Windex drenched paper towels under the print heads. I probably used gallons in the three years I used those machines. Eventually, I grew tired of wasting ink, time, and money in a never ending battle with clogs. I could rid the blockages for awhile, but they always returned. I finally gave up and moved to another brand.
In my experience, I found Windex with ammonia to be effective and dramatically cheaper than that $300 per gallon (50% water, various alcohols, dye, etc.), purpose made, liquid gold.
Everyone cautions against using Windex, but I never experienced any negative issues.
