Clean and dry the feet to ensure a better fit. Remove an epical from the package and place it with the ring on the callus. Secure it using the adhesive ends of the patch. To be properly applied, the decal should not slide or move. Change the dressing every two days until the callus is easily removed. A maximum of five epicalia can be used for each callus. It should not be applied to more than three calluses at the same time. The product should be stored at a temperature below 30 C and away from direct sources of heat and moisture.