Bathtub drain smells sour. What will work?

There is a product at Wal -mart sold in a gallon jug.. in the drain opener section.. It is made just for bath tub drain problems.. I have used it many times.. I think it is even cheaper then the regular liquid plumber ect... Anyway, it works really good.. Seems like it is in a red or black container.. It looks like a more generic brand.. but I depend on it..I am sure that you still have hair and soap scum in your drain.. if the smell is still there.. This stuff will clean it out.. I am sure some of the others would work also.. But if you can find it keep some on hand and if your tub starts draining slow .. pour some down.. You might want to consider a new strainer for the drain if you are getting alot of hair... Hope this helps.. : )

it is just going to have to take some time and air dry out if bleach and vinegar did not work it has to air out give it a couple of days try washing your bathtub with the vinegar and get it at least sparkling clean pour the vinegar in the tub and put the tub stopper down so the vinegar is left in the tub while cleaning it after your done cleaning the tub then open the drain and let the vinegar go down the drain and then rinse the tub.that might take some of the smell away that way.

I would try SoftScrub with Bleach. Squirt a BUNCH of it around the edges of the drain so that it clings to the inside of the pipe as it goes down. Let it sit for an hour if possible. You might even try a bottle brush down there to clean the drain walls, or just let a lot of hot water run down after it. This should kill the mold and other icky stuff since the product will cling to the drain better than straight bleach would.

Good luck!

I would buy some Liquid Plumber (Extra Strength, Overnight, Brown Bottle Variety). Pour the whole bottle in there, and don't use the tub overnight. Then, in the morning, run VERY HOT water in the drain for about 10-15 mins. See if that helps! It definitely sounds like there is still a clog in there. Good Luck!

What comes out a drain would gag a maggot! It may sound strange but I have used a bottle of hydrogen peroxide down the drain. It's cheap enough and you can hear it working. Try it out; you might be surprised. I like it.

You both have a clog within the fundamental drain or your vent is clogged and/or too small. Start snaking the drains. Go to Lowe's plumbing segment and ask the accomplice for recommendation on which one to get & the right way to use it

Go with the first answer (drain opener). It worked for me.