Illinois growing zones range from zones 5-7. By looking at the map above and locating the approximate area in which you live, you will be able to find your Illinois hardiness planting zone. Simply compare the color-coded zones for your area with those of the legend on the right of the map.
1 Place the toilet brush into the mixture and allow it to soak for several hours. 2  Remove the brush to see if it is clean. 3  If needed, add more crystals (another 1/3 -1/2 cup). 4  Soak it longer if needed. 5  Once the brush is clean, remove it from the water, rinse and allow it to dry completely. Fill a bucket half full with water. 2  Add 2-3 cups of washing soda crystals to the water. 3  Place the toilet brush into the mixture and allow it to soak for several hours. 4  Remove the brush to see if it is clean. 5  If needed, add more crystals (another 1/3 -1/2 cup).
Step 3. Combine 1/2 cup of warm water with 1/2 cup of white vinegar in a large bowl or the bathroom sink. Sterilize brushes by soaking them in the mixture for 20 to 30 minutes. Don't soak hairbrushes any longer, as soaking can mar wooden brushes and damage the rubber cushions. Alternatively, sterilize brushes by soaking them in a mixture of 1/4 cup ammonia and 1 cup warm water.