You're happy that the stain could be removed, and then you're left with an ugly stain ring. Here is a tip on how to avoid this:
Avoid stain edges
Circular motions when removing
To prevent rings from forming when you want to remove a stain with a stain remover or other agents, you should always rub in circular motions from the outside in.
Hair dryer for drying
It is best to dry the treated stain immediately with a hair dryer; this also prevents stain rings from forming.
Read also: Remove water stains from wood
Photo by Sabine, meinhaushalt.at