remove the 2 nuts. check for repair; repair/replace the floor flange
after you pull up the toilet, and new wax or waxless seal.
see:
www.fluidmaster.com
we use plumber's putty instead beneath edges, it stays soft.


wrote:
A few weeks ago, we used DAP Dynaflex 230 latex sealant while retiling
the bathroom, and used a thick bead of it as caulk between the toilet
and floor to prevent the possibility of leaks. Now we're trying to
pull up the toilet again to replace one of the tiles, but the toilet
won't detach from the floor! We're afraid to pull much harder on the
toilet because we don't want to crack the porcelain.
Help?