Alcohol, ammoniac, bleach and other products containing these substances will bleach a waxed finish. If they are allowed to drip onto a wax finished terracotta floor, they can form white stains which are very difficult to remove.
The best solution is to use PS87 degreasing wax removing detergent, to dewax the entire affected tile. Rinse the tile off with water then, when it is dry and clean, apply a new wax treatment: MATT* for a natural effect, SATIN* for a satin finish, and CLASSIC* or LONGLIFE* for a gloss finish.
*check product availability in your market