Source: A banking friend told me about this method and I have used it for years for my stamps.
By Ann from Loup City, NE
I keep this on the table where I do my rubber stamping. This method is great for any type of rubber stamps. I have some that are over 30 years old and they are still in great condition.
I stamp, stamp, stamp, the rubber or foam stamp on the sponge, and rinse in the water in the dish. Keeping a large terry towel beside the pie plate filled with water; then stamp to dry.
NEVER use a scrubbing motion on any stamp, as it will cause it to get sticky, and it won't come off. The only motion to use is the up and down stamping motion.
By hopeful from Salem, OR - temporarily in TX