Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Easy to use, impossible to clean

My son LOVED eating out of these. We tried oatmeal, bananas, and apple. However I was never able to fully clean the mesh, which is not removable, despite considerable effort. That, unfortunately, makes them pretty useless. I also have concerns what kind of dye was used to color the mesh. There are several similar products where the mesh is removable. I'll try one of those out next.