Car failed MOT on lamps in not good working order but lights work???

[daisycat01]

Hi, my car has failed its MOT, 2lights failed on item 1.1.4a in not good working order and 1 has failed on 1.1.4a not in a clean condition and function impared. My husband has been out today and cant work out the problem as he thinks all 3 lights work and that the bulb dont need replacing. Do I need to clean the fuses? Could it be that the car is just dirty?!! Can you fix "dull" headlamps?

TIA

Bumping for you.

Do they have condensation inside/is the silver backing bubbled and corroded?

"1.1.4a not in a clean condition and function impaired." Yes, that means it's dirty . If the light is covered in muck, the light will be duller.