Have you changed the way you manufacture the ZALR04B Love frame? The soot from the engraving appears to be much darker and denser than on past units. When we go to clean it, it is very difficult to get rid of the soot without leaving a brown tinge. We have also tried the Mr. Clean eraser pads with limited success. One of the problems seems to be that when you use a cloth in water and engrave in the calligraphy fonts (Scriptina or Beautiful ES), the dampness of the cloth lifts the paper from the product.

Thanks in advance