Reapplying sunscreen is important.

Applying sunscreen once before leaving the house isn't the end of it~

Since the loss of sunscreen's UV protection ability cannot be determined by the white cast,

Consistent reapplication is necessary regardless of loss of function.

Generally, it is recommended to reapply every 3 to 4 hours.

Since it is difficult to reapply cream sunscreen after applying makeup, if you use spray or stick formulations

It seems like you can reapply it without any hassle.