If your platen is aluminum, you can use about any soap or solvent you are comfortable using. Even 400 grit sandpaper, 0000 or 000 grade steel wool if you have a real mess. If your platen is anodized (likely black), stay away from abrasives and stick to solvents.
If your platen is cast acrylic (likely if clear or black plastic), mild soap and water are best. There are specific cleaners available for cast acrylics (Brillianize is one). All plastic manufacturers advise against just about every solvent you would find at your local hardware store. Ammonia based (409 and Windex), alcohol, acetone, or other organic solvents can damage the platen at a molecular level and create cracks.
Also, use a microfiber cloth on acrylics. While it won't affect the function, paper towels will create scratches and leave the platen hazy/foggy.
Darren
If your platen is cast acrylic (likely if clear or black plastic), mild soap and water are best. There are specific cleaners available for cast acrylics (Brillianize is one). All plastic manufacturers advise against just about every solvent you would find at your local hardware store. Ammonia based (409 and Windex), alcohol, acetone, or other organic solvents can damage the platen at a molecular level and create cracks.
Also, use a microfiber cloth on acrylics. While it won't affect the function, paper towels will create scratches and leave the platen hazy/foggy.
Darren