Hope someone can set my mind at ease. I have a 2014 Arctic Fox 5'er and have had it out a couple of times. When I use the Black Tank Flush I'm not sure if it's working. I can hear the water running...
I too let the sprayer run about 3-4 minutes then open the valve. Might do this 2-3 times. I have come to the conclusion that the tank will never be totally clean.