a black pen to draw on the bi fold glass doors and then wipe off

[mckenzie]

is there such a thing do you think? It's for Halloween (spider webs)

Use drywipe pens at work onto glass HTH

Just buy a whiteboard pen.

I draw on the glass at school and it easily comes off.

Sorry that should have "I use"

Chinagraph marker

You can definitely buy window chalk/pens.

Or an OHP pens? You might need acetone to wipe it off, but that's what I used to use in labs to write on the fume hoods.

thank you all