My bathroom sink has been draining slower by the day, and plumbers are fully booked until after Christmas. What can I try first?

simple step is often all it takes to restore proper drainage, as hair and soap scum are common culprits of slow drains.
3. Try The Zip Tie Or Drain Snake Hack For Early Hair Buildup
If removing the stopper didn’t solve the problem, the next step is to try using a zip tie or a small drain snake to remove any hair buildup that’s deeper in the drain. A zip tie can be transformed into a makeshift tool by cutting small notches into it, creating hooks that can snag hair