The built-in protection on Stainmaster carpets CAN be damaged by incorrect cleaning agents. Lower priced cleaners may use harsh chemicals to speed up the cleaning job, but they can also do permanent damage to the fibres, that will not be apparent until some time in the future.
Providing the operator doesn’t use cleaning agents that are above the PH tolerence for the stain resist treatment, it won’t be affected. However some stain resist treatment will wear off over time in hight traffic areas and will need to be topped up after each clean. Again, talk to your technicianj and have him advise you.
It is important to use a cleaner who is trained in the use of the correct cleaning agents and procedures, and then you can be confident that there will be no damage done to your carpet. A cheap clean may end up costing you more in the long run.