The 7.4mL bottle of Deoxit Gold recommended by Elizabeth ($32.95 on Amazon, $29.95 from Michael Percy) is included in the company’s K-DG100L-2DB kit, available from Markertek for $25.99. In addition to the 7.4mL bottle of Gold, the kit includes a 7.4mL bottle of the Red cleaner, and a number of good cleaning utensils.
I, like Elizabeth, prefer the 100% strength liquid form of Deoxit; no over-spray mess or waste of the diluted strength aerosol version. By the way, the Red contains a higher percentage of the Deoxit cleaning chemical than does the Gold.