April 5, 2019
August 17, 2014
Hello jayut and welcome to the forum. I can’t think of an explanation for the phenomenon you are observing, although dirty electricity levels may vary depending on what is happening outside the home as well as inside. So if there is more use of equipment which generates dirty electricity that could increase levels in your home.
As an example, we tend to have a slightly different problem here. During the summer levels can rise dramatically. I suspect it’s because many of the holiday homes are occupied and several of them have solar power. Some solar inverters are notorious for generating dirty power.