Fix It and keep it

A problem with the bolts that hold the toilet bowl to the floor is that sometimes they work themselves loose if they weren't tightened properly after the toilet bowl was installed. When you first install a new toilet you have what is called a wax gasket that goes between the toilet bowl and the floor. The gasket is really made of wax so it needs to compress fully before the floor bolts on the toilet will stay tight. If you tighten the bolts and someone sits on the toilet and compresses the wax gasket further than it had been originally the bolts will appear to come loose. It is not the bolts coming loose, but instead it is the toilet sinking into the wax gasket and ending up lower that it had been before so the bolts will stick up and no longer be tight. Just re-tighten the bolts and that should correct the problem, but only if the toilet has compressed the wax gasket fully so it cannot sink to the floor any more.

If you have a problem where the bolts have been loose for quite a while they may not be so easy to turn, in that case you will need to spray them with WD-40 and hold them lightly at the bottom with a pair of needle nose pliers with tape or some sort of cushion on the ends so you don't damage the threads of the nut while you screw the nut up to the pliers, then move the pliers to the top of the bolt and continue tightening until the nut just makes contact with the porcelain of the toilet. Then put the decorative cover back over the bolt.