how to fix up bulkhead connector?

... Do you need to remove and clean up both the interior and the underhood sides of the connector in order to clean it properly? ...
I did, in both my A's. I bought a release tool for the females (~$7 auto electric web site), along w/ new terminals. The females are hard to clean even outside the housings, but I did w/ a small file. Many posts on releasing the male terminals, and they are easy to clean once out. If your car is 1963 or 1965 (please, always tell us), you won't have the "melted bulkhead" concerns of all other years.