How Many Hours Does Spf Last How Many Hours Should I Reapply Sunscreen If Im Not Swimming Or At The Beach?

How many hours should i reapply sunscreen if im not swimming or at the beach? - how many hours does spf last

I use a sunscreen, because I so easily and I have no tan marks and uneven skin (not that there is something wrong with that its not my thing)

But how often should I again if I just normal daily activities with moderate sun exposure, as it quickly in the car, on foot, the sun through the windows, etc.

I use SPF 70, how long they last.