Review on Honeywell HEV615 & HEV620 Compatible Durabasics HFT600 Filter Replacements (4 Pack) by Byron Howell

I run and refill my humidifier on high 24/7, since my apartment quickly dries out in the winter. I had to purchase a box of these because Honeywell didn't have any available, and I needed an urgent replacement. I thought the first one was working okay, until the check filter light illuminated a few days after putting it in. The top half of the filter was mostly dry, and 3/4 of it was completely black. I wash out my humidifier every time I change the filter, so the issue isn't from standing water.After having the same issue with the second filter, I waited an hour or two after soaking and installing the third one before checking on it. I found that the top third of the filter had mostly dried out. I'm now on the fourth filter because most of the third filter also turned black. While these are definitely cheap, they don't absorb water quickly enough for constant use with the humidifier set to high, and I think the very light moisture is encouraging mold or mildew growth.Despite the filters not working well for my use case. They might work okay for someone else who doesn't run their humidifier as often.