When the Wartner Wart Pen is used for the first time, it is necessary to fully turn the dial on the top of the pen clockwise to load the gel into the brush tip until the first drop is visible. Several full turns might be needed as the gel is stored at the top of the Pen (to avoid leakage prior to first treatment)
Do not turn the dial more than the amount of times necessary to release 1 drop of formulation, as this may result in over-dispensing of TCA and smearing on normal skin, which might cause severe irritation of the area.