If I’m out of a hotel, I wear everything in the shower. Each piece gets rinsed under the shower head and dumped on the floor. Then I hang it all on the balcony if available, unzip the drysuit, and have a shower myself.
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The girlfriend of one of my students uses this: https://www.amazon.com/dp/B00IFHFJXI/. I'm going to try it as it looks like it works well. Kind of nice to have a large cooler filled with water to do a preliminary rinse at the dive site.
I also use this along with a large fresh water can at the dive site and give my regs, computer and camera a rinse down every time I exit the water.
At home I have a small paved area at the back of the appartment where I soak all the hard gear first and then rinse the wetsuits in a small inflateable pool. Young one loves assisting especially in summer months.
...Rinse at the dive site with a hose and dedicated dunk tanks...
Hose, water, driveway, air....