Please check my sentences grammatically(9.4)

I feel disgust when I see someone drying his or her dirty hair with a hair dryer in public. I beieve that eating slowly is a good habit. I eat slowly because my father made me do it when I was a kid. I believe that eating sowly is good for my health, but sometimes I feel uncomfortable when I eat with other people. Although they finish eating before me, I still  continue to eat  slowly becuase it's my regular habit. Sometimes I feel  sicken when I see some people  eat and talk with food in their mouth.