|Shower deodorant--soda and boiling water|
Assaulted the tub drain the same way, though it had not yet ripened. Soda and boiling water. My thinking was that the soda would neutralize the acidy stuff and the boiling water would soften and wash away sludgy soap and hair conditioner scum.
All the hoopla took place earlier today. I've put off checking the results, not wanting to be disappointed enough to come up with another plan. Upon gathering my wandering courage a short time ago, I discovered, hallelujah-hooray, the drain is essentially odor free. So the other thing I get to do today is write that down so I'll remember it for any future similar situation.