Have you tried SILCLEAR from Mapleshade?

Using silver bearing products on tube pins, is NOT for everyone. It takes a steady hand, an ability to limit the amount applied and extreme caution. Some have no attention for detail, should completely avoid the practice and perhaps the products(altogether). They WILL cause a short, if used incorrectly, in any circuit.

Quicksilver is what I've been using for years and have been very satisfied. Haven't tried the Gold. Perhaps: when this container runs out. But then(I believe), if you use up a container of the stuff in less than ten years(on audio connections), you've probably applied too much.

Quicksilver is supposed to dry out, and leave the deposit of silver behind. The container can be taped(airtight) and placed in a vacuum sealed bag, which prevents it's drying out in storage.