This stuff is AMAZING! I had a 20 year old white board that my nieces & nephews draw on and it had become SO nasty that I was thinking about replacing it. I thought for the minimal cost I would try to clean it first. Not having high hopes but WOW! I wish I had taken before & after pictures because this product really WORKED! I am not replacing my white board....now I'll just give it a cleaning every now & then.I was very skeptical prior to purchasing this product. I didn’t see the need for such a specific product. However, it really does provide a superior result on a whiteboard, much more so than traditional glass or multi-surface cleaner. It easily removes stubborn marks from different brands of dry erase markers.It only takes a couple of minutes to spray down and wipe the white board daily with this product. The difference is huge.love this stuff! but one of my bottles was slightly unscrewed and leaked in the box and made the container sticky. probably a fluke.Great for cleaning a dry erase board. Include in a goodie basket for your favorite teacher.The product is great and does what it needs to do. However, 47 bottles were just randomly thrown into a box and several of them opened and leaked out. There are definitely better ways to package this many bottle for shipment.Saves me some elbow grease! I have a black dry erase board with neon marker and it’s a PAIN to remove. This takes it off in one swipe.Works but not perfect. Still have to use elbow grease. Leaves a film and hard to write on the board after you use thisIt cleans the board but it does no miracles.99% Rubbing alcohol work 1000x better.This might work if the marker is fresh, but old marks barely changed after multiple applications. Took 10 seconds with rubbing alcohol.Should've tested it sooner, as my return window has closed.Seriously, don't waste your time or money.The product works not great but ok. Restores the messed up board back to usable state.Packaging use to ship the product was just ok.. shipper might as well just wrap in paper, the packaging material used is no different.Last but not the least, this non returnable product was shown as expo brand but what was delivered is not same. Check pictures attached.The 2 stars given is just because it worked ok.I try using a monthly white board calendar to keep myself organized, but the stains after the month are extremely difficult to remove, and I have stopped using it. I tried using this product to remove the stains, and unfortunately did not work. It seems it would work fine for fresh marks, but at that point, you would just use an eraser. I was so excited since everything I tried hasn’t removed the whiteboard stains, but this didn’t work for me either.For a test I marked my dry board with red and black dry erase marks, I then sprayed this new expo onto the board and wiped it with a dry cloth, nothing happened so I sprayed the cloth and wiped it again with no change. I still had some very old Expo cleaner and tried that and presto, clean as a whistle so what is wrong with this new stuff??