I remember seeing a thread about this. Someone called hotel jacuzzi tubs something along the line of "toilet tub"
The body oils and the dirt that clings to the oil gets caught up in the jets. You're basically bathing in other people's sweat and gunk.
If I remember correctly, somebody recommended cleaning that type of tub before using it by filling it with very hot water, squirting in some dish detergent
NO NO NO disher washer detergent not liquid dish soap. You would have bubble galore.(works best to cut the grease) and turning the jets on for a while. Empty the tub and repeat with clean warm water to get the dish soap out of the jets.
Sounds like too much hassle for me. I'll just use the shower.