My 1996 jeep grand cherokee smell anifreez incar

the water sound i believe is from being low in antifreeze..if you are adding water oncce a week then there is a leak.. try looking on the inside of the car on the passenger side carpet to see if its wet..if not, then check things under the hood such as, heater hoses for heater core, water pump, thermostat housing, radiator, core plugs, block heater..if the smell is coming from the inside and there is a film on the window, then chances are you need a heater core....try that.