Submitted Photo Strawberries are a good source of vitamin C and soluble fiber. (NDSU photo)

I was alone working on my computer in my office. I heard the doorknob rattling. I got up from my office chair to investigate, but I didn’t open the door.

At first, I thought someone was trying to enter my office. The rattling stopped and I waited to open the door until I heard the main office door close.

I peeked into the hallway. A custodial staff member was disinfecting the doorknobs.

Many people were working from home in March of 2020 during the start of the pandemic. I decided to “isolate” in my office at work. Regular cleaning and disinfecting became part of a germ-fighting protocol in offices and homes nationwide.

Two years ago at the start of the pandemic, our concept of “clean” changed quite a bit. As we enter a time when many people are thinking about spring cleaning, here are some questions to try.

1. How long should you wash your hands?

a. 10 seconds

b. 20 seconds

c. 30 seconds

2. If you do not have handwashing facilities available, you could use a hand sanitizer. What percent alcohol should effective sanitizers contain?

a. 30 percent

b. 40 percent

c. 60 percent

3. The label on a container says to “use appropriate PPE.” What does this mean?

4. What is the name for removing soil and other contaminants from a surface?

a. Sanitizing

b. Cleaning

c. Disinfecting

5. What is the name for reducing the number of microorganisms from a surface?

a. Sanitizing

b. Cleaning

c. Deodorizing

6. You are planning to use a bleach solution to reduce germs on kitchen surfaces. What is the recommended amount of chlorine bleach and water to use according to the U.S. Department of Agriculture?

a. 1 teaspoon of unscented chlorine bleach per gallon of water

b. 1 tablespoon of unscented chlorine bleach per gallon of water

c. ¼ cup of unscented chlorine bleach per gallon of water

7. Which of these bacteria could be on kitchen surfaces or in your refrigerator? Choose all that apply.

a. Listeria

b. E. coli

c. Salmonella

8. What is the best way to clean fresh produce?

a. Under running water

b. With a bleach-water solution

c. With soapy water

9. What temperature should water reach in a dishwasher to sanitize plastic cutting boards?

a. 150 F

b. 160 F

c. 170 F

How did you do? Here are the answers: 1. b. 2. c. 3. Personal protective equipment includes rubber gloves and eye protection. 4. b. 5. a. 6. b, but test surfaces in an inconspicuous spot. 7. Any of the listed organisms plus others could be on kitchen surfaces. 8. a. Rinsing fresh produce under running water is the recommendation. 9. c.

Visit the Partnership for Food Safety Education (www.fightbac.org/spring-clean-your-way-to-a-safer-kitchen/) for more information about spring cleaning your way to a safer kitchen.

Spring fruits and vegetables are coming our way soon, including strawberries. One cup of strawberries provides about 50 calories. Strawberries are a good source of vitamin C and soluble fiber.

Strawberry Oat Muffins

1 cup quick cooking oats

1/2 cup packed brown sugar

1 cup plain Greek yogurt

1/3 cup oil

1 beaten egg

1 cup all-purpose flour (plus some extra for strawberries)

1/2 teaspoon salt

1 teaspoon baking powder

1/2 teaspoon baking soda

1 cup chopped strawberries

Preheat the oven to 400 degrees F. Line a 12-cup muffin pan with paper liners. Add oats, brown sugar, Greek yogurt, oil and egg to a medium bowl and mix very well. Set aside for five minutes. In the meantime, mix flour, salt, baking powder and baking soda in a large bowl until evenly combined. Mix the strawberries with 1 to 2 tablespoons of flour in a small bowl. Add the wet ingredients to the bowl with the dry ingredients and stir just until combined. Batter will be lumpy. Do not overmix. Fold in the strawberries with two to three stirs. Evenly divide the muffin batter between the prepared muffin cups. Bake on the middle rack for 20 minutes or until a toothpick inserted into the middle comes out mostly clean. Cool the muffins in the pan for five to 10 minutes, then remove and cool completely on a cooking rack.

Makes 12 muffins. Each muffin has 190 calories, 8 grams (g) fat, 6 g protein, 23 g carbohydrate, 1 g fiber and 210 milligrams sodium.