How do people know they are made in China if the bag says they are "Proudly made in the USA?" Anyone know for sure where these are made??

The ones that I just received from Amazon say on both the front and back "Made In the USA". The item number is DM301124, copyright 2019. I'm looking forward to testing them out. I'm going to mark off each time that I used them to keep track of the 10 uses per bag.

Anyone recently order these that can tell me if these are still the Chinese knockoffs people were complaining about in 2012?

The bags from Sunnyside Up are definitely not Chinese knock-offs. Purchased from a reputable major retailer in the US.

What does it mean by saying 'Able to be re-used up to 10 times'? Does it mean it dosen't work after using 10 times?

Read only this review!!!, some are wasting our time w nonsensical reviews. Yes they can be used many times. I used four XL bags for 6-7 years. I used one for bananas and hardly never needed to wash it. Wipe condensation off everyday (on all bags) with paper towel, (I leave 3-4 folded together under bananas bag and just reuse ptowels for months to wipe condensation off, only takes a min. Other bags for different produce just very lightly washed them, shake off water, stand upside down to dry. The trick is to NOT forget about the food and letting it decompose but it's still washable. Sometimes I let them soak if I let them get nasty. Most of u are wasteful, have too much money and don't take care of things. So go ahead and just buy more bags and keep destroying the planet. Who cares? Maybe yr children? I'm sorry, but I think we can all do better. Please be a conscious consumer and be nice to each other. Peace

How do I close the bags

Keep the bags loose and open, or at least not completely sealed. I also put in sheets of paper towels inside the bags to absorb the excess moisture from the veggies. I've had spinach and cilantro last me a couple of weeks if I keep it completely dry by: 1) washing it 2) spinning it as dry as possible, 3) putting a couple of sheets of paper towels on the bottom of the green bags and keeping the opening loose.