It is important that you understand the principle behind the treatment: The wart should be iced COMPLETE! Just cool the surface brings nothing. Who wants to do the wart sure needs as long draufhalten until have formed around the affected area of ice crystals on the skin. Only when around the wart, a white circle (an ice rink) is created, penetrates the cold front also in the depth. For this purpose, it is (again depending on the size) sometimes necessary to foam once or twice nachzukühlen (ie in total up to 3 * 3 seconds per treatment to the can and then 30 per - 60 seconds on the wart).
The white spot disappears within a few minutes, then reddens the skin area and the healing begins. Experience shows that it takes three days to can tell you whether the treatment was successful or not. If there are only the slightest doubt that the wart has survived, not wait for them to be completely regenerated, but repeat the treatment immediately.
Conclusion: As unfortunately so often is overly cautious and these manufacturers in formulating the description of medical devices. On one hand, of course, on the other hand but surely one of the reasons why so many indicate that the treatment did not work with them. I used the first can also strictly according to specification, and it has brought nothing - nothing! The second box I have used at their discretion. Meanwhile warts apply with us as extinct ;-)
