there is no way to take the front of the glass off. Are you looking to polish the outside of the lense, or really clean the inside?
Untill you have filled the entire thing with mud, you will have no idea how big of a pain in the ass it is to get cleaned out.
I wound up removing the light from the back. and the lowest turn signal, and run a hose through it for about 9 hours. There is still dried up mud in there, but at least it works.
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Still rollin with the South Side Ninja