well i just started to use my ph pen...i heard people keep it in wet sponges to prolong the life .....what does every one do to take care of there ph pens?
50ul }{4ck3r Reviewed by 50ul }{4ck3r on . Storing my ph pen? well i just started to use my ph pen...i heard people keep it in wet sponges to prolong the life .....what does every one do to take care of there ph pens? Rating: 5