[Magic Fingers]

It appears that the coating kills microbes by a mechanical action, which would seem to make it less likely that a resistant strain would develop.

[freebilly]

It appears that the coating kills microbes by a mechanical action, which would seem to make it less likely that a resistant strain would develop.

Less likely in this case means a 99.9% rather than 100% likelihood.

A resistant strain of bacteria will appear over time.