Happiness is nice hot shower until you come toe-to-toe with the dreaded slow draining bath tub.
So you ignore it as long as you can, but then there comes a point when that drain just has to get cleaned. And if not done correctly, trying to clean the drain is messy and futile. If you just use a cup plunger by itself, not a whole lot is going to happen other than you'll make a big splash. You won't however get a whole lot of drain clearing done.
Why? Because your tub has an overflow drain that will "short circuit" the pressure and vacuum in the drain line needed for the plunger to operate.
In the tutorial Unclog a Tub Drain "MacGyver Style" I'll show you how to use a ubiquitous roll of duct tape to get that overflow drain under control and increase the effectiveness of the plunger.
So make that plunge count and have a read!