I have an IntelliChlor SWG for my in-ground spa. Today I noticed that the readout on the EasyTouch 4 control panel spiked from 3,200 ppm yesterday to 3,950 ppm today. For the past month the readout indicated a salt level between 3,000 - 3,400 ppm consistently. The IntelliChlor was installed about 3 months ago so I am assuming that deposit build-up on the core is likely not an issue. Is it recommended that I pull the core & clean it? Any other thoughts to explain the spike in the salt level? Thank you.