This $8 cleaning solution is my new favorite tech essential - see the results for yourself

Koala cleaner is my go-to for keeping my prescription glasses, laptop, iPhone, tablet, and other items streak, smudge, and dirt-free, and it's super affordable.

I've been wearing prescription glasses since I was 18 months old, so trust me when I tell you I know a lot about keeping lenses clean and protected -- I've had over 20 years of practice. 

While it may seem like you can clean your sunglasses or glasses with any old "glass cleaner," or something as simple as soap and water, I am here to tell you that it can be a huge (and costly) mistake. Most glass cleaning products (even dish soap) can be too abrasive and harsh on specialized lenses and damage protective coatings for UV, glare, blue light, and more. 

Of course, clean at your own risk, but I ...