Alcohol, ammonia, bleach and products containing these substances will bleach a waxed finish. If they drip onto a waxed terracotta floor, they can form white stains which are very difficult to remove.
Use PS87 Heavy Duty Cleaner, to strip the entire surface. Dilute 1:5, let sit for 15 minutes, then scrub and rinse thoroughly with water.
When the surface is clean and dry, apply a new wax treatment. MATT for a natural effect, SATIN for a satin finish