Hi,
I had to spray into the pots and slide switches of a portable and a clock radio as they were getting mighty scratchy and cutting out when adjusting volume. Of course, some leaked onto the outside plastic case around the controls, leaving a small area of foggy whitish on the black case. I noticed wiping the area with a damp cloth restores the color for about 5 seconds, and then back to the foggy white when the water evaporates. What can I use to safely remove the foggy residue. I used Tech Spray Envi-ro-tech 1677. Strange it looks OK when it looks wet. Thanks much.