A single misstep

Have ordered the "Logilink Spray Duster" and he came to after 2 days. For a star. The product itself is a total letdown: I tried to use it in my PC case and even on the pictured on the packaging Keyboard Logitech MK300, the result was a joke, everything was just a bit greasy, the dirt between the keys to lies from which one hopes will remove it only spun and remains within the keyboard, in addition to briefly white gas foam forms on the keyboard. In addition, all because it is a pressurized gas cleaner, extremely flammable. Overall, absolutely not recommended because it does not fulfill its purpose.