This Cleaner saved us from dumping our A3 printer. Four new heads were going to cost us over £120 so we tried the Fillserv Cartridge and Print Head Cleaner as a last resort after an internet search. This product is fantastic. Repeated cleaning cycles on the printer failed to work. 3 treatments with your cleaner and the heads are as good as new. Thank you so much for a great product. We are very happy with the results and you are a very easy company to deal with. Easy to place an order with and very speedy delivery. Many, many thanks