Ok so I've replaced the existing H7s one recently fitted Ring H7 and an Osram that was in the other dip lamp last year when got the C70 the lamp with the older bulb had a poorly defined cutoff pattern. So replaced both dip lamps bulbs with Osram Twenty20 Daylight +100% Halogen Headlight Bulbs. The poor cutoff pattern no improvement. On close inspection the reflector needs cleaning, but I have the thought that will only make things worse, spoil the reflective finish. Consequence of the numerous reports of that happening.

(Rant open)
I don't want to up-grade to the new antisocial max glare dazzle everyone HID projector units. No thank-you.

Here in Wales lots of combined Hills and bends, for instance a right hand bend-apex of a hill, oncoming vehicles even on dip beam halogens light straight in your eyes, the dam HID projectors leave X-ray prints of your head on the roof lining.
(Rant closed)

So gents, renovating the reflectors method, success and costs, any experiences?