This is a step in how to make an infinity led clean mirror. This gif is of a woman holding a spray bottle with some type of chemical cleaner and spraying it on a mirror laying on the grey counter top. It sprays all around the mirror with a white liquid. The hand starts scrubbing the mirror starting from the right side, up and down, and then moving over to the other side cleaning it, leaving it clean and shiny. You can see the reflection of a window on the left side.
Check out the tutorial:
DIY Illusion Mirror