Have a 50 gal hot water heater that was not producing much hot water. I
replaced the Dip Tube and still not much improvement. The manufacture told
me to do a draw test, measure the temperature in 7 consecutive 5 gallon
buckets drawn from hot water.

The results we 105, 111, 106, 101, 99, 96, 93

What could this mean, have not called the manufacture yet but would like to
get other opinions. Dip Tube installed improperly, would a hot water
heater go bad like this, any information would be helpful, thanks!