I can have another go at that, but a plumber did try that 1-2 yrs ago. BTW, this has been an ongoing problem, to which our "approach" has been to depend on out 2nd bathroom for the serious stuff.I think I would address the rim holes once again. clean them out with a piece of coat-hanger. take a look and see if the commode has a siphon hole in the bowl. this can and will become clogged with deposits over time and definitely needs cleaned out also. this is what gives you the oomp in emptying the bowl. it is located opposite the flush hole in the bowl. just my 2 cents.
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