"Thorough rinsing" means to rinse something completely or fully. It is the act of washing or cleaning something very well by using water or a liquid to remove any dirt, residue, or unwanted substance. Full definition
Other grooming tips include: occasional bathing with a mild soap like a quality dog shampoo; thorough rinsing with lukewarm water and use of a cotton ball or soft cloth for the outer portion of the inside ear. (gwdhumanesociety.org)
Some of this sodium can be removed by thorough rinsing, and we definitely encourage you to do so. (whfoods.com)
If you give your dog the canned variety, toss the chickpeas into a colander and give them a very thorough rinsing before passing them on to your pup. (smartdogowners.com)