a half cup borax,
two tablespoons laudry detergent soap flakes,
one tablespoon ammonia,
and one gallon of warm water.

Use full strength in spray bottle or add two cups to a pail of warm water.Use full strength in spray bottle or add two cups to a pail of warm water. If any stickiness remains, try using baking soda as a scrub agent. Apply it directly to the area - it should remove any residue without harming the finish.