Washing clothes in the bathtub?

Is there anyone here who washes their clothes in the bathtub? In my apartment complex there is one washer and one dryer that both cost $1.75. So just to do one load of laundry, I shell out $3.50. I always tried to budget like $40 a month for laundry but I’m trying to cut expenses anywhere I can. For reference I get free water in my apartment.

I don’t know, just trying to find others who are going through the same things I am. Thanks in advance for your kindness.