"...our sins are like klipot, Hebrew for shells or husks; like barnacles, they have a hard shell and grip our souls tenaciously. Shofar can remove them by immersing us in a sonic mikvah (ritual bath)."Rev. Gabbai Eli Shirim Lester recently pointed out that klipot shares the same root as k'lee, a term that can mean a container, vessel, or musical instrument. I have previously pointed out that k'lee is also used in Tanach to refer to vessels made from horn and could also indicate a shofar.
This means we can use a k'lee to remove klippot to do teshuvah.