Don't
rub on sunscreen when you apply it.
That cuts the potency by up to 25%.
To protect yourself from skin cancer,
use the simple trick
doctors use
when they apply sunscreen on
themselves.
To learn more read the book
"Protection from Sun and Wind"
by Ida Tomshinsky.
The book available at www amazon.com,
www.xlibris. com,
www.bn.com, and local bookstores.