Another key when using it is to place a dab on some throw away surface, instead of applying it directly from the bottle. This way you can cap it right away, and only the excess you squeezed out that isn't used is thrown away. I'm using one of those Zap products, bottle is half empty and still good. It has both a needle plug cap and a cover that doesn't come in contact with the glue - this really helps in keeping the integrity of the seal.
regards,
Jack