Securit Liquid Chalkmarker Pen Cleaning Spray 500ml - Remove Residue Liquid Chalk From Blackboards & Chalkboards, Paint Marker Cleaning Spray, School Supplies - Glass Cleaner

Just the job. Removes it easily

Excellent

Very good product. Cleans chalk from chalkboard quickly and easily.

Love this stuff just wish it were a little cheaper.

Expensive but does the job, I tried everything to remove the waterproof chalk pen from glass and this was the only thing that worked.

Just doesn't do the job.

Not brilliant on a blackboard.

I bought this for cleaning liquid chalk off a blackboard menu. You still need to rub really hard to get it off. I’ve used Elbow grease which only costs about £1.50 with the same result. I wouldn’t waste your money on this.