Since we moved into the house about a year ago the toilets had exhibited half-hearted flushing. Multiple flushes hadn't yielded better results, in fact the only thing that helped was pouring an extra 1/2 gallon of water into the bowl during the flush. I had adjusted the tank water level and tested and replaced each of the components, all to no avail. I googled and none of the suggested remedies I found had worked. I was discussing my latest theory with Kirk when he told me his. He said he thought the hole at the front of the well at the bottom of the bowl was not putting out a sufficient flow of water during the flush. I told him I would check it out. I did and never went on to my theory because he was right.
When I put my pinkie into the hole it was almost entirely blocked. Lubbock has very hard water, high in mineral content and the minerals had built up to almost completely obstruct the opening. I used an icepick to clear the obstruction, working carefully so as not to chip the porcelain. Voila! Both of our toilets now flush perfectly. I thought I would post this for those who had been similarly afflicted.
PS: Now that I knew what I was looking for, I went back to google and found that well down in the slow toilet solutions, someone had listed this one. I just hadn't searched deep enough.