In a prior article, we introduced the four aspects of cleaning: TACT (Temperature, Agitation, Concentration and Time). Temperature and agitation are important when used in a balance with concentration and time. The old adage “more is better” does not apply to concentration of chemical cleaning products. 


Remember that water is the primary solvent for all pH based cleaners used in custodial operations. Too much chemical can do more damage than good. This is a time for careful reading and abiding by the label directions as to mixture. A measuring cup can be a tremendous help in mixing correctly. Always check to see if the product is to be poured into the water or is water to be poured into the chemical. Avoid splashing and spills. Use recommended PPE’s (on label or MSD) and take into account water hardness to find the best outcomes.


Time is the last element of TACT and can be very important in the cleaning process. When we refer to “dwell time” or “contact time” we are describing the recommended minutes that a properly mixed solution should allowed on a surface or fiber to accomplish best outcomes. An example is that when stripper is applied to a hard floor to remove finish, it is important that the floor stay wet for enough time for the solution (concentration) to break up the floor finish. Be careful of allowing the floor to dry out since such an error can increase labor. If not enough time is allowed for the solution to work, it may result in having to redo the process to get down to the bare floor.


The usual image of TACT is an adjustable pie chart that shows each of the cleaning elements in balance. When one part is increased or decreased, another element will change accordingly. 


Your comments and questions are important. I hope to hear from you soon. Until then, keep it clean…


Mickey Crowe has been involved in the industry for over 35 years. He is a trainer, speaker and consultant. You can reach Mickey at 678-314-2171 or