A cooling system problem is a problem that you should never think its ok, generally by the time you notice the leak, in some cases its been leaking a while. what's your temp gauge/light stating?, is there enough coolant in the system? is there a check engine light on?, In most cases it is overheating, or there may be a leak in the reservoir container? are you able to clearly check all the hoses, I had a heater hose that was leaking one time and I did not notice the leak, until one day I had my hood raised and the vehicle was warm to hot, and noticed a small pin hole in the hose sending coolant slightly into the air to other hot engine parts. Are you a DIY ? Did you just purchase this vehicle? A leak test, and through visual of the engine compartment is needed. Coolant hoses deteriorate from inside out, and outside in,(something rubbing against the hose). how long are you driving the vehicle before and after when you notice the fluid on the ground or floor? ? You say that the hoses "seem" fine, with the coolant system you just cant have ANY leaks. Have this vehicles cooling system check as soon as possible, the one thing I also know is that a cooling system problem only gets worse overtime, which will cost more. You have temperature sensors, hoses, radiator, water pump, thermostat, and heater core, so there are a few places where the leak can come from, and you don't want to do a head gasket on this vehicle, or a bad core plug, so have this vehicle visually, and up on the rack,and pressure tested to check for leaks. Also make sure the cooling fans, and line from the radiator are operating and not leaking. let me know I almost over looked your no steam or smell while driving, think about it when you are driving the air will take away smells, and some major steam. when the head gasket is worn you will notice the major white steam it will follow you.
So don't depend on seeing or smelling right now get that vehicle to a shop to have it properly checked out.
