Cleaning is removing of visible soil such organic or/and inorganic material from the surface or objects and is accomplished manually or mechanically using water detergent solution. Good and thoroughly cleaning can remove microorganisms up to 80% and is essential before disinfection procedure starts because:

  • The residual material (organic or inorganic) can interfere with effectiveness of this process.
  • The residual can “protect” microbes against killing effects of disinfectant.

There are four factors in cleaning procedure (Sinner circle) which influence the final result:

  • Time
  • Temperature
  • Mechanical
  • Chemical

Sinner circleDr H. Sinner shows that the reduction of one factor (ex. by mechanical power – efficient equipment) can be compensated for by any of the three other factors.

Chemical: represents the action of detergent solution (alkaline, acid or neutral).  The action is change by the concentration of the product in the solution (water + product).

Mechanical: This is the action of mechanical or manual equipment. Mechanical equipment such floor polishers, scrubbers or presser water systems generate scrubbing and pressure effect. If manual cleaning equipment is used, the person provides mechanical action by rubbing with a scrubber or brush.
The care in cleaning procedure must be taken when using mechanical action in order to avoid damaging the surface being cleaned.

Temperature: the temperature or heat of the working solution is regularly used in cleaning activities. Hot water improves cleaning (detergent) activity and final result.

Time:  During cleaning procedure, the time is closely related to the chemical action. Detergent requires “contact time” – the time for re-action. Leaving the solution on the surface for a while (contact time depends on product themselves) makes it easier to remove.