The reason why your glasses keep fogging up is because your breath is escaping out the top of your mask causing your lenses to fog.
Adjust your mask ties
Is your mask tight and snug? Adjusting the nose bar and your mask ties can make a real difference. The tighter the fit of the mask, the more it is going to stop your breath from coming out.
Stick your mask on your nose and cheeks with some surgical tape
If the weight of your glasses doesn’t do the trick, you can always use some surgical tape to adhere your mask to your face. You’ll find that the longer the tape is the better the seal will be so it’s best to stick the tape onto the bridge of your nose and along your cheek bone. You can find suitable surgical tape easily at your local pharmacy.
Pull your mask up your nose and rest your glasses on top
If you can seal the top of the mask with the weight of your glasses, you'll notice a lot less fogging. You can also try bending the metal strip at the top of your mask to make it more air tight.
Rubbing a bar of soap on the front and back of your lens and wiping it off with a lint free cloth or tissue. This method creates a thin film on the lens and helps deter condensation from building up on the lens.
Use contact lenses
If you’re fed up and can’t seem to get the hang of wearing a mask with your glasses, contacts could be the way to go. We offer a free contact lens trial for people new to contact lenses.