Problem with inserting was - friction.

Tweek is a 'contact enhancer' and lubricant as a bonus, came out ~83 (a friend, partner at Sumiko tm'd the name, bought the very expensive active ingredient from a weird Canadian guy - who didn't know how to market it).

In brief - it *really* cures intermittents, especially in sockets, switches handling lo-current, lo-volt signals. Under pressure of the contact forces: substance actually conducts. I always use it on any board slot, chip, etc. I have to deal with (sometimes just putting a drop on already installed ICs and wiggling slightly - works too).

The lube made it easy to insert the DIPS - whose legs were always formed just a bit wide.. for the spacing of the socket.

(Hi end audio shops often stock this - it's same active surfactant as in 'Cramolin Red' - but not same as the also useful Caig cleaners and nostrums)

A.