Here are the main ways I deal with mouth sounds:
1. Prevent them
Make sure you're hydrated, it's important for your health. I take a big swig of water and swish it around my mouth before I go for the take, making sure to target the areas where I feel like the mouth sounds are coming from (are the little bubbles at your teeth? in the back of your tongue as you go for a particular vowel sound? pay attention and swish accordingly)
2. Cut them out of the mix
Unless I am intentionally going for a very natural, room-y / preamp hiss-y sound, I trim my vocal tracks aggressively. The track starts
right when the vocal part starts, and cuts out
right when the line is delivered, with a steep fade out. Like this:
View attachment 149129
I find that a lot of the pops are right
before the line, as I shape my mouth to the first sound, and can be cut away. (This also helps me remove things like amp hiss and unwanted room reflections, and removes unnecessary audio from my mix.)
3. Reduce them with plugins
You might be able to target the particular frequency of the click sound with an EQ and surgically remove it with a very narrow band while keeping the overall vocal sound intact.
If you're heavily compressing your vocals, you will magnify the click sounds as well, so you might back off the ratio a bit to de-emphasize them (at the cost of a more dynamic vocal track).
4. Live with them
People have mouths and those mouths are full of saliva. Sometimes it makes sounds. It happens.
Hope this helps!
s