The answer to 'why is my hardwood floor greasy' is that a greasy or oily film on hardwood floors is often caused by a buildup of dirt, grime, and residue from cleaning products over time. This can happen if the floors aren't properly cleaned and maintained on a regular basis.
Some common symptoms of a greasy hardwood floor include a sticky or slippery feel underfoot, a dull or cloudy appearance, and difficulty keeping the floor clean. This can be a frustrating problem, but there are some steps you can take to address it.