Q: The drain in one shower in our home keeps plugging up. We put baking soda and vinegar down the drain and water flows better, but in about a month, the drain is plugged up again. What should we do?

I have a very 1970s set of valves/pipes in my shower, that are of course, chrome. The sink faucet and bathroom accessories however, are bronze. I also have (not installed) the valve/spigot/shower head ...