The problem is that the drain cleaners go down into the "P-Trap' where it is supposed to desolve hair and cloggs.. but that is not where the problem is. If you look down into the drain (about 1 inch below the level of the tub, you will see a 'cross' looking bottom of the bethtub drain... that is where the hair is. (The P-trap is about 3-6 inches below that). What you will need to do is to get a pair of 'forcepts or needle nose pliers and reach in as far as you can (between the cris-cross of the drain) and 'grasp' then pull out.... Do this a number of time reaching in-between the cris-cross piece-(there are 4 'holes' or spaces).. Just 'reach in and grasp and pull out.. You will be surprised at the clumps of matted hair and slim you pull out. you will get long clumps of strands of hair. That should solve your problem. If you don't have a pair of forcepts or needle-nose pliers, take a coat hanger or piece of similar thickness wire and form a very small 'hook' at the end. Again, reach in and purhaps 'twist' your hand in a 'scooping' manner to scratch or scrap the drain.. Again, you will get lots of hair.. Good Luck.. Let us know how you make out.