These should possibly be diluted with distilled or bottled water, depending on product strength. This may also help to reduce irritation in the area.
Distilled water is optimal.
A stronger solution is not better as you can burn your piercing with too much salt. Invert it over the area to form a vacuum and soak directly for a few minutes. For certain placements it is easier to use a clean cotton ball or gauze pad soaked in the salt water and applied to the pierced area. Follow with a clear water rinse or splash then pat dry with paper products. Salt water soaks help to stimulate air and blood circulation which facilitates healing.