The dreaded Drivers Side Headlamp Issue - Condensation!

Hi Everyone

New to the Forum so please bear with me. I've done a search and cannot find a definitive answer to the condensation in the drivers side headlamp issue. I have removed the rear cover and this has improved things slightly, but that really isn't a long term solution in our climate. I have heard that drilling a hole in the cover helps too, but why does this happen in the first place? Does anyone actually know Is it worth me buying a new headlamp or is the problem still going to occur with that?

Thanks in advance

Martin

Had this for ages ended up driving with the light's on everywhere to keep some heat in there to drive the condensation out with the cover off.

Have today changed to philips led HL direct H4 replacements one of the benefits being despite the lower power consumption [20W at dipped] they claim the cooling fan heats the light enclosure to "defrost" it"!

Does anyone have the correct part number for a rh drive offside front headlamp, plenty of rh headlamp units on the 'bay but we need a rh drive beam.