If possible, steer clear of handling your coins. The condition of collectible coins impacts the value: dirty, scratched, moisture-damaged or otherwise imperfect coins can result from too much handling. If circumstances require you to touch your collectibles, do so touching only the outsides, especially with very valuable or rare coins in good condition.

Coin cleaning, which is not recommended, should be done only by an expert, and only when absolutely necessary. In fact, the patina developed on a coin over time may actually be a desirable quality to collectors and a cleaned coin could actually decrease it's potential value.

Collections will most likely be fine under the safety of a store-bought holder; just make sure that it will keep your most valuable Roosevelt dimes out of harm's way by locking out moisture as well as fingerprints and dust. Packets that are stapled or taped do not provide the greatest protection; however, there are alternative protectors available that guard also against moisture. Protect your collectible coins when they are in storage by choosing a dry space and never one that is damp and cool, such as the basement.