you can use a heat gun to heat the lense (but be carefull not to damage paint on grill/bonnet/wing), but htis wont cure the problem fully as it will come back at some point or another (especially with weather temp change now), you must have a small hole somewhere or a split in the seal between the lense and the case, you could try seperating the 2 and resealing using a strong adhesive sealant, but this can sometimes prove tricky, if the light does look like its had it, go for the mk4 look lamps they juice up the front end of any mk3!!
Gaz
