How to unclog holes around the toilet
I recently realized that two of my toilets have very weak flushes due to the clogged holes around the rim. I tried unclogging them with a paper clip or a wire hanger to no avail. I'm pretty sure it's not the holes themselves but what inside the rim (perhaps some mineral build-up---the house is over 20 years old) that's preventing the water from draining. I could visually see that the water flows out of the other holes on the right side but no water flow apparent on the left.
Is there something I could buy to remove or reduce some of this build-up that perhaps I could let sit in the tank?