How to Fix Those Sunglasses That Keep Falling Off: Clever DIY Tricks to Tighten Wide-Armed Shades and Stop the Slide

 Learn how to tighten loose sunglasses at home using heat, water, or simple tricks—no optician visit required

Sunshine season is in full swing, and there’s nothing like throwing on a stylish pair of sunglasses to boost your confidence and shield your eyes. But what if your favorite shades don’t fit quite right? If they keep slipping down your nose or feel loose around the temples, don’t toss them just yet. With a few simple adjustments and tricks—many of which you can try at home—you can fix those too-wide sunglasses and enjoy a snug, stay-put fit all day long.

Start by checking the material—acetate and metal frames call for different strategies

Before you begin, take a good look at your sunglasses. If the arms (temples) feel too wide, they may be adjustable depending on the frame material. Most plastic frames are made from a flexible material called acetate, which responds well to heat. If you’re working with metal frames, they may also be adjusted, though with extra care.

For acetate frames, the go-to method is gentle heat. Use a hairdryer on a medium setting and blow warm air on the arms—especially the parts you plan to bend—keeping the nozzle a few inches away. After a minute or two, when the material feels warm and slightly pliable, gently press the arms inward, curving them slightly starting from the temple area. Don’t try to get it perfect in one go—reheat and adjust in small steps until the fit is snug without being too tight.

Dealing with metal frames? Bring on the hot water instead of hot air

If your frames are metal, skip the hairdryer and boil some water instead. Submerge the arms (not the lenses!) in hot water for about 30 seconds. Once they’re warm, remove them carefully—use a towel or gloves to avoid burning your hands—and gently bend the arms inward. Metal is a bit trickier, so make small, measured adjustments. You can also use pliers padded with a soft cloth for more control, especially if the hinges need tightening.

Try this elastic band hack for a no-heat solution that really works

For a quick, no-heat fix, grab a couple of small rubber bands or hair elastics. This hack is especially useful if your sunglasses only need a tiny bit of tightening. Wrap the bands around the temples near the hinge, adding layers until you feel the fit improve. Not only will it add grip, but it can also give your sunglasses a quirky, custom look. This works well for people with narrow faces who struggle to find perfectly fitting shades.

When DIY doesn’t cut it, a local optician can work magic

If the adjustments aren’t quite working—or if you’re nervous about bending your sunglasses at home—your best bet is to visit a local eyewear professional. Most optical shops can adjust sunglasses on-site, often for free or a small fee. They have precision tools and the expertise to tweak even tricky frames without damage. They may also have suggestions or accessories like silicone nose pads or temple grips that add comfort and prevent slipping.

Take your time and stay safe—especially when working with heat or tools

A snug fit is great, but never force your sunglasses into a shape they’re not meant to hold. Rushing the process or using too much pressure can crack frames or strip hinges. Take it slow, heat in intervals, and always check the flexibility of your frames before you adjust. And if anything feels off, stop and get help from an expert.

With a little patience, some clever heat hacks, and the right touch, you can rescue those slipping sunglasses from the bottom of your bag and put them back into stylish rotation. Whether you're walking through the city or lounging poolside, you deserve shades that stay put and keep up with your summer adventures.

Disclaimer: I am not a medical or eyewear professional. This article is for informational purposes only. Always use caution when adjusting eyewear at home, and consult an optician or eyewear specialist if you are unsure.