Dirt in my headlight

Hi All,

Back in early December, the serviceman fitted a new headlight globe to my 100 series Cruiser. Unfortunately, he did not seat it properly as one of the lugs on the globe did not seat properly. This resulted in the globe not sealing the back of the headlight reflector.

As you all know, December was very wet and I had done a lot of driving on wet and muddy roads. The result, that headlight is not as bright as it should be due to dirt on the reflector.

Any ideas on the best way to clean it out? It just seems to be coated in dirt, not rust.

Thanks in advance,

Michael