Foam Gum and Ultra Foam Shampoo

[TR6speed]

Two part question.

Part one, deal with the Adams Premium 35 oz Foam Gun.  I have used it twice now and both times it runs out before I can foam the entire car.  I blamed it the first time on the setting, so I backed it down today and again it ran dry before I finished the last part of the car.  I still had the passenger door and front fender to do.  I put in the right amount of Ultra Foam Shampoo (2-3 oz) filled it with warm water.  I have a cheap foam gum that actually makes better foam and last longer.  So what am I doing wrong or is this standard?

Next is the Ultra Foam Shampoo.  Now this may have been my fault, as I filled the bucket with water with the Ultra Foam Shampoo already in the wash bucket and it looked like it made a lot of suds.  However, I went in to have a quick breakfast and when I returned it appeared that most of the suds were gone, but yet the bucket I use for the wheels and tires with just Adams regular wash Shampoo was still full of suds.

Any ideas?