Belkin has temporarily halted sales of its InvisiGlass Ultra screen protector for iPhone X after numerous complaints about it cracking way too easily.

The $39.95 screen protector is no longer available to purchase from Belkin's website or Apple's online store after dozens of customers—but not all—complained about it cracking in normal usage conditions and without ever dropping their devices. We're told it has also been pulled from shelves at Apple retail stores around the world.

Here's one customer review from Belkin's website:

I purchased this at the Apple Store a little over a month ago and had them install it using their machine. Installation was quick and the fit on my iPhone X was flawless. I loved the glass feel and everything was fine until a couple days ago when I lightly tapped on the top portion of the screen with my pen and it cracked! There are 3 crack lines coming from the initial crack point. I am very disappointed in the durability of this product to say the least.

When we first reached out to Belkin about the InvisiGlass Ultra's many one-star reviews in November, a company spokesperson informed us that it had not identified any issues with the screen protector at the time. It has since changed tune.

"We have been constantly testing this product since we released the first generation of it timed to iPhone X availability and things have evolved since you and I last spoke," a Belkin spokesperson informed MacRumors. "We identified some improvements to be made in the next generation of this product."

A new and hopefully improved version of the InvisiGlass Ultra screen protector for the iPhone X will be available to purchase from Apple in January and from Belkin around January or February, according to the spokesperson.

Belkin said it considers "product quality and consumer feedback of paramount importance" and said that customers who have any questions should contact the company directly or reach out to their local Apple store. Belkin didn't specify if customers will be eligible for a refund, but hopefully it honors these requests.

The original InvisiGlass Ultra uses 0.21mm ion-strengthened glass from iPhone display glass manufacturer Corning. Belkin said the screen protector improved the iPhone X's scratch resistance by up to three to five times, with up to a 25 percent increase in protection against cracking and breakage from drops.

The InvisiGlass Ultra was released in late October alongside Belkin's anti-glare and tempered glass screen protectors for iPhone X, which both remain available to purchase for $19.95 and $24.95 respectively.