Like "do you have a the priking devise that you can prick on the plam of your hand you do it on the back side of your hand in the soft part below the thub and below the baby finger soft part accros from the thumb the lover part of the back of the hand also if you use alchol to wipe fingers it drys them out my dr. said wash your hands every time you test that should be good enough because the alcohal dries your finger out."