Indeed, some of the most controversial elements being overturned or prohibited by the Every Student Succeeds Act were implemented not under No Child Left Behind but through the waiver system. It was through the waivers (and the Race to the Top grant program) that the Obama administration mandated test-score-based teacher evaluations.
Vinegar, bleach and borax powder are some examples. Bleach -- If you want to use something stronger than vinegar, then use bleach. Bleach is best used when the rings and stains are already too tough. Pour half a cup of powder into the toilet bowl. Leave it that way for a few hours before you flush the bleach away.
Hard water stains appear as white, hazy spots on glass surfaces. This is due to a build-up of alkaline and other minerals in your water. While these stains are notoriously tough to remove, there are several cleaning and prevention methods that can help get your glass back into sparkling condition.ne of the best ways to get rid of hard water stains is to intervene at the source of the problem and try to correct the pH balance and mineral levels in your water. 1  You can try to remove the minerals in the water by attaching a filter to your water system.