On Feb 6, 8:07*pm, wrote:
Our toilet leaks at the base and rots the wood floor. *We've pulled it
twice now, cleaned the junction, replaced the wax ring, and reseated
...
Are there special wax rings that might help prevent this problem?

Don't bother with the wax seals. Use a wax-free seal; Fernco makes a
couple. They've very tolerant of movement, bad level, depth, etc.