Review on 🖌️ Kassa Liquid Chalk Markers Fine Tip 10 Pack - Erasable Chalkboard Markers in Gold and Silver - Versatile Wet Erase Pens for Glass, Blackboard, and Windows - Dual Chisel & Bullet Tip Included by Brittney Reynolds

I was very surprised how bright they are. I use them on glass, the friction and control is amazing. I use a 50/50 water/alcohol solution to wipe it off the glass surface. Some people complain that they dry out or don't work when new. Shake vigorously for a minute, then squeeze the tip a few times to start the flow. Make sure you can hear the ball inside while you shake. If it isn't, tap the marker on a hard surface to loosen the mixing ball inside. UPDATE: I noticed that you don't need to use a water and alcohol mixture to wipe after drying on a glass surface. It's mostly chalk at this point, and you can remove it with a microfiber cloth or an eraser. Easier than I thought.