Can saliva cure acne?

A couple of weeks ago I posted a snippet from the book, “Can You Get Hooked on Lip Balm?” As mentioned in that post, the authors are behind the blog The Beauty Brains.
Today I’ll share another gem from the book for discussion here.  The question:

My grandmother always told me that putting saliva on my pimples before going to sleep was the best way to get rid of them.  Although a lot of people said it was an old wives’ tale, it always worked for me.  Is there any science to back this up or was I experiencing a placebo effect?

Can saliva cure acne?

Ew, please don’t lick my face