MY HUSBAND (9YEARS AGO) FIXED UP THE BATHROOM. OVER TIME THE CALKING HAS COME A LOOSE FROM THE TUB AREA AND IS STARTING TO MOLD. I'M TIRED OF LOOKING AT IT AND WANT TO DO IT MYSELF SINCE HE SEEMS TO WANT TO TAKE HIS TIME REPLACING IT. HOW DO I DO IT WITHOUT MAKING A GREAT MESS? PLEASE HELP. I'M DESPERATELY SEEKING SOME ADVICE HERE.