If another group of scientists claimed that they tried your “caffeine and spider webs” experiment but that they were not able to get the same results, what is one variable they could overlook that MIGHT affect the results dramatically?

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature