I have an upstairs bathroom with double sink. Water drains very slowly from both of them, which is very strange. Used all kinds of cleaing solutions with no luck. The bathroom is fairly new and sparingly used. Accordingly, chances of hair and other debris going in to cause that much obstruction in both of them would be that much less. I still tried all kinds of cleaners but absolutely no luck. Any advice from the experts? Can it be a venting problem? Please help. Thanks very much

Could be a venting issue but lets go after a clog first. Double sink but look under the cabinet to see if you have two traps or just one, I'll wait here

Thanks very much for writing back. There are two traps.

Thanks much for responding. There are two traps

Then your clog is inside the pipes in the wall. Remove a trap and rod straight into the wall pipe using a 1/4" twist type snake. There is a 90 elbow about 4" in so push and twist firmly, rod the full length of your snake

Thanks a lot. Will try this week-end.