Anyone dribble their gray ?

I attended an event this summer in a town where all the hotels were booked. A bunch of people rented TT's from a local shop. They set all the RV's up with the Grey (shower) cracked open. I'm sure it was so they wouldn't fill up over the 4 days we were there. I closed the one next to me as you could definitely smell the soapy water. I have had to open mine a few times depending on where we are and how long we are there. I always wait until it is full first, then find a way to drain off enough to get through the stay. I have a hose, so I connect my garden hose to it and drain it either under the trailer or off to some shrubs. I don't like doing it and can definitely smell it, but sometimes you need more space. I am discreet when I do it.