I am a commercial janitorial service in Little Rock, AR. We typically use Ultrapack Extreme as our pre-spray and All Fiber Rinse (powder) through our truck mount rinse. I ensure when we switch over from pre-spray to cleaning, they flush the solution hose enough to get the rinse to the wand. But, should I worry about there being rinse in the solution line as we're pre-spraying? Will it be enough to affect our pre-spray?