During the day, you can safely continue with your skincare routine. At night instead, it is generally recommended to use the patches on clean, product-free skin. However some sisters have shared that they like to apply their favorite serum about 20 minutes before using the healing patches, allowing it to absorb. This way, they can dry their skin before applying the patches to ensure they stay in place.
They also feel that this method helps to maximize the serum's effect.