If your Software Skin formula contains a prescription retinoid or a skin lightening agent, you should apply the formula at night time. This is because these ingredients degrade quickly when exposed to sunlight, they also have the potential to make your skin more sensitive to UV rays.
If you forget to apply your Software treatment one night, please do not apply it in the morning to make up for the application that you missed. It is best to wait until the next night.
Azelaic Acid is safe to use in the morning or evening. If your treatment contains two bottles, please apply the Azelaic acid in the morning and the prescription retinoid at night.