Comment 5 for bug 731653

I'm not sure the behavior is perfected yet. Right now I see two problems with it:

1) The evaporation stops if the mouse arrow is moved by even one pixel
2) The evaporation takes too long (this is more of an opinion)

I would suggest the following changes:

1) Increase the speed of the evaporation
2) To make up for the shorter evaporation time, increase the time until evaporation
3) Continue evaporation as long as the mouse arrow remains over the thumb