Electric window contacts

[Koshy]

Hi all

I recently bought a series 1 R33 and the driver’s side window doesn’t always go down. It will always go up and playing with the switch a bit usually does the trick to get it down.

I’ve done a search and people have said it is either dry solder on the relays or dirty contacts. When I had the immobiliser installed he said it may be the relays and checked them for me but they are fine.

So I pulled apart the window module to try and clean the contacts but can’t figure out how. The switches just appear to be plastic boxes with a plastic slide that the actual switch moves. Has anyone had this problem or know how to clean the contacts?

Cheers