But before you start pouring, let’s answer the burning question:
Skip the bleach. Here is what actually works.
A plastic drain snake (zip-it tool) or a wire hanger. The Cost: $3–$5. How to do it: Push the barbed tool down the drain, twist it, and pull it up. You will pull up a disgusting, wet "rat" of hair and sludge. This solves 90% of shower clogs instantly.
Enzyme drain cleaner (look for "bio-enzymatic" on the label). The Cost: $10–$15. How to do it: Pour the enzymes down the drain before bed. They eat organic waste (hair, skin, soap) overnight. This is safe for all pipes and the environment. Note: This is slow—it works over hours, not seconds.