First, the application: This is really very simple. Simply Cyber Clean firmly pressing on the keyboard to wait and pull bit. This procedure a couple of times to repeat, and the keyboard has hardly residues. Only occasionally I could find some dirt. The mass remains amazingly, together with no problems.
Well, so far so good, now I have another clean keyboard, but to me is the question of how long I can use this product, or if I can clean it !?
The packaging is only a small indication, where you can compare if the blob has become darker, and have been lost its beneficial properties.
But there is no indication of how I can use the product as long as possible without it "bad" is. A small description would have been enough.
The slightly defective cleaning tips and information about product set this down for me on 4 stars. It works very well, which is why, despite its is a strong buy recommendation.