When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I would remove the headlight and try to use a high power vacuum through the lamp holes. Maybe compressed air could help. Otherwise, you may need to remove the front plastic cover and you would have to reseal it. Not a simple procedure to take the front cover off.