22. Keep In Mind That There Is No Sunscreen That Can Give You Absolute, 100 Per Cent Sun Protection.
There will always be some rays that will be able to penetrate through. Besides, sunscreens are made to be reapplied. If you go past the maximum sun protection time your sunscreen can provide, that guarantees that your skin will burn but, that burn time is also variable as it is only a measure of the average time it takes for skin to burn — yours may take earlier.