Patent ID: 8888926

Claim:
A medical instrument cleaning concentrate consisting essentially of (i) a biofilm permeation agent, (ii) a nonionic alkoxylated alcohol surfactant having an HLB ranging from about 5 to less than 8, wherein the surfactant is selected from the group consisting of a single nonionic surfactant having an HLB of from about 5 to less than 8 and a mixture of surfactants each having an average HLB value of from about 5 to less than 8, wherein a weight ratio of (i) to (ii) in the concentrate based on 100 wt. % active ingredients ranges from about 0.5:1 to about 1.5:1, and (iii) an inert diluent, wherein a cleaning solution containing the concentrate is effective to clean the medical instruments without leaving detectible traces of components (i) or (ii) on surfaces of the medical instruments after rinsing.