If you're tempted to use more chemical than the label says - thinking it will achieve better cleaning or faster results - DON'T!
First, excess detergent will likely leave excess residue on the carpet, which can attract soils. Plus, using extra product will start to cost you serious money. Just calculate the cost of repeatedly using even one extra ounce per gallon of concentrate over a period of days or weeks!
Most importantly, many detergent systems need a specific amount of water to function properly. Making and using stronger-than-recommended concentrations may not actually clean as well.
Most detergent products are designed to work at a specific concentration. The formulation, concentration and pH are engineered by expert chemists to achieve the best results.