A foggy situation: Districts take steps to cut the risk of virus spread as students return to school The Minnesota Department of Education provides some guidelines for schools to follow, but districts also get to use their own discretion. 4:52 pm, Mar. 10, 2021 × Dover-Eyota Elementary School lead custodian Wayne Ellringer slowly backs out of a first-grade classroom fogging it with disinfectant Wednesday morning, March 10, 2021. Ellringer says the process is pretty quick, using only 4 ounces of the disinfectant to fog all of the classrooms in the school. (Ken Klotzbach / kklotzbach@postbulletin.com) Early Wednesday morning, Wayne Ellringer walked into a classroom in Dover-Eyota's elementary school armed with a plastic jug attached to a small hose. He plugged the contraption into an outlet and started shooting a cloud of disinfectant throughout the room, killing any lingering germs that may have made it past the cleaning wipes and hand sanitizer used throughout the week.