You might have a toilet that's sneaking a leak and is costing you a fortune in water bills. A slow-leaking toilet that doesn't make any noise wastes hundreds of gallons of water a year and greatly reduces commode efficiency. If you think this might be the case, here's what to do. From deep within the Carey Brothers' vault of techniques and tricks to flush out a porcelain thief, we bring this advice. To check for a slow (but costly) leak, lift the tank lid and add some food coloring. After an hour, if it seeps into the bowl, the toilet's a leaker and the cause is probably in the tank ball or the flapper valve or possibly the valve opening it seats on. Check for debris or cracks and see if it's properly clean. Check the valve seat and flapper or ball. If it still leaks, replace the parts. They're inexpensive and a lot less costly that the water they'll waste. And that's the On The House tip for today.