More free information on spearfishing: http://kbelousov.ru/wppb/bystryj-stra...
If your mask is leaking, follow these steps:
1. Pick up a mask at the store. Face up - inhale.
2. Don't grimace in the water.
3. Strap - at the back of your head.
4. Snorkel - should not push the strap away.
5. Strap - do not tighten (allow free exhalation under the mask).
6. Correctly tuck the seal onto your face, under your wetsuit.
7. Shave your mustache, under your nose.
8. Shave before hunting (especially for those who don't wear a mustache or beard).
9. The bottom edge of the seal - up to your nose.
10. Silicone cream - sometimes helps.
11. If your mask leaks a little, be patient and don't take it as a disaster. The burning sensation will quickly subside.
12. If there's a leak, exhale through the mask. Keep the mask underwater if you're not hunting. Keep it above water if you're fishing.
More about spearfishing gear here: https://www.podvodohota.ru/