Printer Guard is an Inkjet printer head and nozzle anti-clog software! We designed Printer Guard to keep the ink flowing in the printer head and nozzles always. The biggest breakdown complaint with almost all inkjet printers is clogged printer heads due to insufficient use. Ink dries inside the printer head because you print infrequently. The other common cause is the use of generic or compatible but poor quality ink. Good grade generics with world-class quality certification like ISO 9001, can be easily obtained at affordable prices and will do just as well for regular use. Low end versions of generic ink are made inferior to keep the cost down without thought to quality. Only buy superior generics from reliable and long-established vendors who offer them at highly competitive prices. You needn't worry about quality with original inks, whatsoever. They are made specifically for print profiles designed for your printer from the inception of that model by the manufacturer. Naturally, they are the best for your printer, if you don't mind the high cost. Being cautious will give you trouble-free service for a few years to come. Not all generics are created equal! Printer Guard PREVENTS clogged nozzles from happening in the first place. So, if you already have clogged nozzles, you would have to manually clear/clean/flush your nozzles first, before running Printer Guard. There are many tutorials and videos on the Internet showing how easy it is to do this with step-by-step instructions, depending on your make and model. However, please note that not all models can be user-cleaned and may require OEM technicians to do it. If you decide to use generics or even rotate with OEM ink, it would be a good idea to scour the generic ink vendor websites to see their recommended models, etc. Old or long dried ink nozzles may be difficult to clear and may take several attempts to clean. In our experience, most dried nozzles can be salvaged.