1995 Buick Century DISAPPEARING ANTI-FREEZE

Smells problem
1995 Buick Century 4 cyl Automatic

MY RESERVE BOX IS ALWAYS EMPTY OF EXTRA ANTI-FREEZE. I KNOW IT IS ONLY FOR LEFT OVER'S FROM THE RADIATOR. BUT THE RADIATOR IS SUCKING UP EVERYTHING. WHAT'S WORSE IS THAT IT IS SOMEHOW LEAKING INSIDE OF THE CAR. I FOUND ANTI-FREEZE RESIDUE NEAR MY GAS PEDAL AND UNDERNEATH BOTH OF MY CAR MATS IN FRONT. ALSO IT IS MESSING UP MY WINDOWS MAKING THEM GREASY. SO WITH IT LEAKING INTO THE CAR I SMELL THE ANTI-FREEZE VERY STRONGLY AND IT HENDERS MY DEFROST FOM WORKING PROPERLY. WHAT IS GOING ON?