What can I pour down a bath drain to dissolve hair and dust clumps?

[emanymton]

A big bottle of cheap supermarket own brand coke can work sometimes.

 

[petee]

Also, a plumber can come & snake the drain...

https://www.lowes.com/n/how-to/how-to-use-drain-snake

i invested in a proper one of those, not as good as the one in that picture, but still.
haven't had to use it yet, but i won't be surprised if the day comes.

 

[TopCat]

A kettle of boiling water does a good job with the soap and phlegm

 

[Saul Goodman]

I have gallons of hydrogen peroxide here. It works extremely well at clearing blockages in sinks.

 

[DaveCinzano]

I'm adding several posters on this thread to The Watchlist

 

[DaveCinzano]

I'm adding several posters on this thread to The Watchlist

Cf posters on the ‘I have a smallholding: recommend me fertiliser wholesalers happy to accept cash’ thread