Expo Dry-Erase Wipes is another great whiteboard accessory to help bring your dry-erase surfaces back to their original glory. In fact, we recommend cleaning your Wipebook Flipcharts with the Expo Dry-Erase Wipes at least once per week to keep your surfaces looking like new. When your dry-erase whiteboard surfaces fall victim to ghosting, grease marks, or dirt, this cleaner will solve that problem for you. Also, as this cleaner is non-toxic, it is safe to use around children. The Expo Dry-Erase Wipes quickly removes shadows, ghosting and stains effortlessly because each 5-1/2" x 10" sheet is moistened with Expo cleaning solution that is non-toxic and safe to use around children. The Expo Dry-Erase Wipes also include a storage area in top of the dispenser to preserve partially used wipes. Also: there are 50 wipes per pack.