Levoit Water Filter 10 Cup Pitcher

The H2O filter arrived on time and in brand new condition. Packaging was great. Instruction manual was easy to read and follow. The process to install the first filter took about 20 minutes, but was fairly easy. The pitcher is well designed and built. I would've like it better if the large top reservoir hole had some type of snap-to-lock mechanism. 1st filter lasted 48 days on the slowest filter setting. I didn't do a cup count for the entirety of the 1st filter, but for the 2nd filter I was able to get approximately 113 cups, which was only 10 days of use on the slowest setting before it started to significantly slow down. It would still filter, but at an extremely slow rat. It took an hour for a whole top reservoir to filter. I'm on my 3rd filter since 3/30/2020 with some problems: when it was only a couple days old, the water would seem to just flow right through the filter as if it wasn't filtering at all, and other times it would drip rapidly like it was filtering normally. I'd have to dump out the water and start over and monitor it to make sure it was filtering properly. I finally removed the filter and let it soak again for 15 minutes and ran it through tap water AND shook it. This seemed to work. The resulting filtered water still leaves white residue after boiling it compared to reverse osmosis water I got from a vending machine and Arrowhead's distilled H2O. Once the filters were ready to be thrown out, it weighed significantly more than a new one. But after drying it out for a few weeks it weighed the same as a new one so it's possible it wasn't filtering heavy metals. I can't say with empirical science as I don't have any testing equipment to measure any data. It does remove most of the chlorine odor of the tap water in my city. Then again, from what I've read from many experts, chlorine is the easiest chemical to remove from tap water simply by leaving it out uncovered for a certain amount of time depending on the amount.