Suds and Soap. Do we really need them?

1. LET’S GET DIRTY
Brooke Stephens
ETES 2320
19 October 2016

2. Without Soap
When I tried to scrub my
hands clean of the coffee
grounds and cooking oil
without using soap, not
much washed off.The water
alone had very little effect on
the mixture on my hands,
and I did not see any
improvement until I used a
paper towel to pat/rub my
hands dry.

3. With Soap
When I tried to scrub my
hands clean of the coffee
grounds and cooking oil using
hand soap, there was a
noticeable difference. As
shown in the previous slide,
the water alone had very little
effect on the mixture, but
when added to hand soap, my
hands were virtually spotless.
The coffee grounds were
almost completely gone and
there was essentially no
cooking oil left on my hands.