Removing Water Based Marker on Dry Erase Board

My three year old scribbled all over my dry erase board. I was clueless and used plain water to clean it. Big mistake. The water marker smeared and it would not come off. I tried so many things, alcohol, hand sanitizer, acetone, etc. I gave up. Once again my three year old found a water marker. I wanted to pull my hair. I knew my mistake last time had been trying to clean it off with plain water. This time, I simply dabbed hand sanitizer on the scribbles and as the marker lifted, I cleaned with a paper towel. It worked. I cleaned the whole board and it worked. The problem last time was my cheap board absorbed some of the water and sealed in the color of the water marker.