Soni Officemate Whiteboard Cleaning Solution, The Best for Removing Shadowing from Dry Erase Boards, Chalkboards & Liquid Chalk Markers - Safe & Non-Toxic, 50 Ml - Pack of 12

My whiteboard was filled with lots of old, faded marks, many made by permanent marker. I tried scrubbing them with off with water, Surf, the spray for my laptop screen, but nothing worked. Then ordered this product and was very disappointed to see that after spraying, they were still not coming out with my whiteboard 'duster'. I thought it was useless. A bit later I found it absolutely clean, like new. Turns out my maid had cleaned it using this spray and plain newspaper. My whiteboard, which I almost threw away in despair, is good as new. Brilliant product!