Review on Uni Posca PC-3M White Glass Paint Marker Pen - Fine Bullet Tip 1.3mm by Lori Aguirre

PROS- 1) Love that since I've been drawing vertical lines on sliding glass doors with this pen I've only had one bird strike and it hasn't been fatal. 2) The lines don't disturb the view much. CONS- 1) The pen tended to dry out with use and when I moved back into place the marker stuck together. Eventually I found out and got the lines. 2) I thought I read a review that said it would hold up to washing, but it comes off with Windex. I was hoping that I wouldn't have to apply every time my grandchildren came to visit. (Actually I just left her handprints on the doors) ;)