Avoid oral contact, rough play, and contact with others' bodily fluids on or near your piercing during healing. Don't use bandaids on a healing piercing. They limit air circulation and the adhesive can irritate the surrounding area. Avoiding sleeping on a piercing during healing is advisable. Don't hang charms or any object from your jewelry until the piercing is fully healed.
Most bodies of water harbor large amounts of bacteria.
Cleaning afterwards is not likely to be effective in preventing infection. Try to avoid activities that put undue stress on the area. Your own sweat and bodily fluids are not harmful to your piercing, provided you clean daily as directed. This can protect the area from restrictive clothing, excess irritation, and impact during physical activities such as contact sports. Make sure pillow cases are clean and changed frequently.