Well, Dad’s away and the tub drain was slower than sluggish.
HBI grabbed his tools,
we used some creative thinking and blocked off the drain-return-thingy with a wet washcloth and a ziploc bag and he got to plunging.
Only 3 or 4 plunges later and you guessed it, a perfectly swirly drain..!!!!!
(ew…ignore how bad the hardware looks in a closeup – it’s just a bad reflection..!!)