- Is the water Soft?
a. Hard water affects the performance of wash products
- Has there been a change in the temperature of the soap mixture?
a. Cold water reduces the effectiveness of soap and waxes.
- Is the dilution tip or foot valve plugged?
- Is the Hydrominder or Metering device functioning properly?
- Is there a problem with the consistency of the water pressure in the line
feeding the hydrominder?
a. Low water pressure will dramatically increase the dilution,
decreasing the concentration of the soap mixture.
- Has the length of the tube running from the source drum been lengthened?
a. An increase in distance creates more resistance which increases
dilution, weakening the soap mixture.
- For automatics, did the dwell time for the presoak get changed?
- Soil Type Issue – warm rains after winter or drought.
All physical and chemical reactions are temperature dependent. This simply
means the higher the water temperature the faster and better the cleaning.
There are limits, keep the temperature under 150 degrees Fahrenheit. Here are
some factors that are temperature dependent.
- Soils and soil deposits are more soluble at elevated temperatures.
- The surface active agents in detergents are more efficient
- Emulsification of dirt, oil and combinations of these types of soils is much
faster at higher temperatures.
- The higher PH builders in detergents break up oils much faster in water
over 140 degrees Fahrenheit.
- Solvents present in liquid detergents remove and hold soils in suspension
faster at elevated temperatures.
The meaning of this in the car wash world. The higher the water temperature,
the faster water, soil and chemical molecules move in the solution. Hot water
simply means Better, Faster, and Stronger cleaning power.