Nike’s most-advanced kicks have been turning into bricks. Blame the internet.

Last month, Nike began selling shoes that lace themselves, much like Marty McFly’s sneakers in “Back to the Future 2.” The $350 Adapt BB shoes wirelessly connect to a phone to tighten and loosen with an app.

Then a dream from 1989 met the exhausting reality of 2019. Fresh out of the box, Nike’s connected shoes recommended a software update — which broke some. More than an embarrassment, it exposed a truth that bears repeating about the future of all sorts of products: When something connects to the internet, you’re not really in control of it.

Mike, a sneaker collector in Virginia, said that his expensive shoes were suddenly no longer even useful as ... shoes. The software update via his Android phone corrupted the “lace engine” so the sneaker couldn’t tighten — even with manual buttons.

“The whole thing is surreal,” said Mike, who spoke on the condition of not using his last name because he’s in the shoe-reselling business and feared retribution.

Nike says the problem affected a small number of customers, though its app has a 2.4-star rating in Google’s Play store.

The self-lacing shoes are hardly the first “smart” thing to turn dumb. We’ve seen Nest thermostats freeze out owners and Teslas that won’t drive after an over-the-air update, a phenomenon called “bricking.”

These experiences have a profane name, and even a Twitter feed.

The term is a play on the awkward adolescence of the “internet of things,” the Silicon Valley idea that connecting ordinary objects to a network will revolutionize homes, cities, farms and, in the case of Nike, feet.

Despite the frequent faceplants, connected gadgets aren’t going away. There’s an argument to be made for going slow in adopting this technology, particularly when it offers trivial benefits. But connectivity is already becoming standard on new cars, speakers, thermostats and doorbells — some of which are quite useful. The world will have nearly 19 billion connected “things” by 2020, triple the number from 2016, Gartner estimates.

There’s a ton at stake for our security and privacy, not to mention sanity and money. So how do we get the good connected things and avoid the ones that are going to end up on the Internet of (expletive) list? Nike says it has now fixed its shoes, but we can learn a few things about staying in control from how it bricked them in the first place.

What really is a connected shoe — or smart speaker, thermostat or other connected thing? It’s a way for a company to stay in your life. Before you bring one home, it’s best to ask if they’re truly relationship material.

Of course, the manufacturers don’t present it that way. Nike says the power-lacing tech in the Adapt BB sneakers allows the shoe’s fit to adjust to athletes’ changing needs. A cable tightens the shoes when you press a button or tap on a smartphone app.

You may not recall the shoes in “Back to the Future 2” using an app to operate. Nike’s app lets you dial in a precise fit and personalize some buttons. But they’re already planning for more: Inside the shoes, there’s also an accelerometer, gyroscope, capacitive and temperature sensor that could be unlocked with software updates to collect information about your steps, performance or ... who knows.

In interviews at the shoe’s launch, executives talked about the Adapt BB as an “intelligent product” or even a communications device. Staying in our lives after a purchase gives a manufacturer new opportunities to make money, be it from our data, advertising, in-app purchases or services.

Software updates are usually a good thing, says Yves Behar, the celebrated designer of many connected devices, from August door locks to the Snoo connected baby bassinet.

“When it works, over-the-air software updates are incredibly useful at prolonging the relevance of a product,” Behar said. Electric car updates improve battery life, and speaker updates improve sound quality, he said. They also provide critical security updates, which we want.

But there’s trust in that relationship that has to be earned, and can be easily ruined by putting features ahead of privacy, simplicity and reliability.

Nike, which has had fits and starts with connected products including the Nike+ footpod and Fuelband that it no longer supports, missed a few trust elements. For one, these sneakers have physical buttons, but they still require working software and power to operate.

Second, while software mishaps happen to every company, Nike really messed up. There are many different phone models, and in its testing Nike didn’t realize some couldn’t maintain a Bluetooth connection well enough to apply a software update.

A corrupted update wouldn’t have been lethal except for another Nike oversight: some shoes shipped without a “gold image” backup of the software they needed to operate.

Many makers of connected things treat customers like guinea pigs. What’s missing is accountability.

Nike could have communicated better about its software problem, but at least it had a warranty and responsive support team.

For Mike in Virginia, the episode mostly cost time in emails, a conference call with Nike, and lots and lots of fussing with his shoes. “I tried all the troubleshooting steps: resetting the hardware, resetting the software, resetting the Bluetooth, uninstalling the app and reinstalling,” he said.

A Nike spokeswoman said: “After working directly with the small number of affected customers, we have resolved the isolated connectivity issues with a software update that will be rolled out,” she said.

Last month, the Internet Society, Mozilla, Common Sense Media and other consumer-rights groups appealed to retailers to endorse standards for internet-of-things products they sell.

They were truly bare minimums — using encryption to keep customer data private, offering security updates, having a process to handle bugs and offering a privacy policy that doesn’t require a law degree to read.

Nike ended up telling Mike that his shoes were not recoverable and needed replacing. He opted for a refund.