I just installed my Smart Shield, now the water coming out is cloudy. What's going on?Updated 2 years ago

Sometimes, when a new water filter cartridge is installed, it is normal for the water produced by the new filter to look cloudy, almost like a glass of skim milk. The cloudy appearance is due to very tiny air bubbles in the water. If you fill a clear glass with the cloudy water you can see the tiny air bubbles slowly rise to the top of the glass over several minutes leaving a clear, clean glass of water. The water is perfectly fine to drink. The air in the water is the same air that you are breathing.
This “cloudiness” happens because when the new water filter cartridge is manufactured, the filter is full of air, not water. 

Also, high end carbon block cartridges will filter water to below 1 micron. By means of comparison, a human hair is 25 microns in diameter so the filter is full of holes 1/5th the diameter of a human hair. When water first starts to flow through the filter it is pushing the air out creating very tiny (5 micron) air bubbles. Once the filter has become completely saturated and all the air in the filter is gone, the filter will not produce any more cloudy water. Cheap, low grade filters do not create this condition. It is normal for the filter to produce cloudy water for 1 to 4 weeks. 

The other thing that could be happening is a pH reaction between the carbon and your water. This again is harmless too but has to do with the pH levels in your water causing a reaction with the carbon. As long as the glass becomes clear after settling for a few minutes, then you are good to go!