I've been using them for about a month and a half (I bought 2 sets). We wash at least one load a day as a family with 3 kids who don't go to the bathroom at night yet. Before that, I had tried various forms of "non-allergenic" or "free and transparent" laundry soaps, which always seemed to give me and my 4-year-old daughter constant outbursts. I came across this by accident and wasn't skeptical. . To be honest I can't say exactly how they work, but they work. We used one set (orange) for 36 days (our clothes smelled a little less clean after one charge) and then switched to yellow. . We still haven't had a good enough day outside to put the first set we used in the sun, so I can't comment on how they charge. I'm here in Minnesota and we've been under -10 for a few weeks. They might be able to recharge in sub-zero temperatures, but I won't risk destroying them. I'm sure they will be ok, I trust other reviewers who said they charge great, just can't speak to that yet. Even if they don't charge, it costs us money. We had just over a month of use on at least one charge a day (often 2 or 3) before having to install a new set. As for the environmental aspect, they step out of the park. . These two balls have less plastic than a big bath of laundry detergent helping us get through the same month. They were packed in flimsy cardboard with no shiny packaging, we threw them in our compost and they were already completely broken. I'm so glad I found her and have been telling everyone about it for the past few days. If you're even on the fence, just give them a try.
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