The answer to 'bathtub slow draining' is that a slow-draining bathtub is usually caused by a clogged drain. This can happen over time as hair, soap scum, and other debris build up in the drain pipe, restricting the flow of water. Symptoms include water taking a long time to drain after a bath or shower, or the tub not draining fully.
There are a few common DIY solutions you can try before calling a professional plumber. First, you can use a plunger to try to dislodge the clog. If that doesn't work, you can try using a drain snake or auger to physically remove the blockage. For more stubborn clogs, a chemical drain cleaner may help dissolve the buildup. However, if these methods don't work or the problem persists, it's best to call in a professional plumber to properly diagnose and fix the issue.