Cleaning bulkhead connectors

Cleaning bulkhead connectors

Another method - I haven't tried but will on a spare.

KnuckleDuster said
Vinegar and table salt solution...dunk connectors and let them soak. Then neutralise with baking soda mixed in water. Does more than you could with a brush.

Kern Dog said
Why not take each terminal out one at a time and treat it to a Scotch Brite pad ?

Yup. Once the connectors are seperated, that's the hardest part IMO.
Here's some pics.
No Spark help