Hello, I happen to enjoy washing clothes. Generally, detergents that are labeled as 'non-bio' will not contain an enzyme.
- do not mix whites with your colours
- wash new jeans on their own for a while, as they will likely bleach
dye / colour
- for heavily-soiled clothing, think about adding more detergent and choosing the correct temperature. A longer wash may be needed, too.
In any case, I have indirectly given my answer already. The enzymatic activity for cleaning the crap off the clothes will be determined by:
- enzyme (detergent) and substrate (crap on clothes) concentrations
- temperature of the solvent (i.e. the
water from your mains) in which the enzyme is dissolved. Different enzymes will function better at different temperatures. Recently, enzymes have been used that can peak at lower temperatures, like 30 Celsius / 85 Fahrenheit.
- time - filthy clothes may simply require a bit longer to be cleaned
One of the most commonly-known models of enzyme kinetics is known as the 'Michaelis-Menton'. I suggest that your daughter research that.