Hello badzy and Welcome to Mrs. Clean's Forum. Clogged drains are very frustrating and I recommend to start with the easiest and least toxic methods first. I would recommend first blocking the overflow and using a plunger. This usually forces whatever is blocking the pipe to be flushed out. Try this a few times and if it is unsuccessful then try using using baking Soda and Vinegar. Pour 1/2 cup of baking soda down the drain first. Then pour in 1/2 cup white vinegar and cover the drain (if possible). Let the mix stand for a few minutes and then pour a kettle of boiling water down the drain to flush it. The combination of baking soda and vinegar can break down fatty acids into soap and glycerin, allowing the clog to wash down the drain. DO NOT USE THIS METHOD AFTER ANY COMMERCIAL DRAIN OPENER HAS BEEN USED OR IS STILL PRESENT IN THE STANDING WATER.
If this is successful, use this for maintaining your drains once a month.
If you are still unsuccessful, you may want to check out other options on the following website: http://www.doityourself.com/stry/cloggeddrains
Best of luck,
Mrs. Clean



