How do you unclog a slow draining bath tub?

Vinegar and baking soda...This may be what you're thinking of:

https://www.hometalk.com/diy/clean/bathroom/the-natural-drain-cleaner-for-your-clogged-drain-19246737?redirected=1

There are several ideas here on how to unclog a drain: https://www.wisebread.com/10-really-easy-ways-to-unclog-drains

Unscrew the drain basket, then use needle nose pliers to reach in and pull out the nest of hair and soap. Be sure to have a plastic bag or something to catch this. It's gross but your drain will flow.

Hi Shirley,

We use the baking soda and vinegar with a hot water rinse on a regular basis. Once you get it cleaned out using ideas from the others, consider using the baking soda and vinegar on a monthly basis to keep it cleaned out. I hope that helps for the future as well as for now. Wishing you the best.

https://www.hometalk.com/search/posts?filter=slow%20bathtub%20drain

I never use chemicals to open my drains, natural or not. It’s easy to remove the overflow cover and the plug then all of the gunk can be removed.

Search YouTube for videos. They will walk you through the process.

when you remove the screws in the overflow cover make sure you have a rag over the drain so you don’t drop the screw down it.

https://homeguides.sfgate.com/fix-slow-bathtub-drain-39158.html

Your local home improvement store will have those inexpensive long pieces of plastic for clearing drains. You could also try a drain snake.