For each of the following identify whether or not ethosis used and explain your reasoning"I read somewhere that bicarbonate of soda is really useful for cleaning, you should try it."

Ethos is not used in this statement. The speaker is simply stating a fact or opinion about the usefulness of bicarbonate of soda for cleaning without trying to establish credibility or appeal to the audience's ethics or values.

Can you dumb it down so AI wont detect it

This statement just shares a suggestion about using bicarbonate of soda for cleaning without trying to sound trustworthy or appealing to ethical values.