crwdns2934241:0crwdne2934241:0 Peter

crwdns2934249:0crwdne2934249:0:

Worked for me too although I couldn't actually see any dirt.  I wiped the circuit board with a small amount of carbon tet as I didn't have any alcohol to hand.

Many thanks for the post.

crwdns2915684:0crwdne2915684:0:

open