What happens when I add more bicarbonate of soda when making glue out of milk?

You usually only need one or the other. Really it's whatever you like. I personally like primer better, but it is up to you. Try both and see which one...

Doing that is not recommended at all. Water will be sufficient. Bicarbonate will alter the taste and quality of the trips.

Yes, it does.

Yes, but it's not really worth it since you will be adding shaving cream. The lotion, shaving cream, and foaming hand wash will make the glue look white, instead of...

Personal opinion, I'd say the fuller the better. Skim milk might make it watery rather than viscous.

You can use clear glue, or any type of liquid craft glue. If you use a glue stick you will have to microwave it.

You could, but be extra careful when boiling it, or else it could sour. Fight milk is very feisty.

It is a fungicide and will help keep any growths off your plants. One risk is something called foliar burn, which appears on leaves as small brown and yellow patches.