Obviously, when you go to the gym, you want to work hard and be physically active. The benefits of this are well known, as are the consequences: sweating - more pleasant for you than for the people around you.
So, to make sure you don't leave a sweaty trail, wipe the benches, equipment and mats after you use them.
Out of courtesy, a nice smelling environment also requires you to wear clean clothes: wearing the same sports gear for several sessions may leave you smelling bad. It is not just in your head.
Here is some advice for cleaning your sportswear:
OUR TRAINING EXERCISES
OUR HERO PRODUCTS