How often to you clean vinyl and the needle?

Records get cleaned before first listen, even new ones. 

Needle gets ultrasonic cleaning when needed, brush it only on occasion when I see something on it. 

The less you touch the needle the less chance you have to ruin it. Have killed a needle trying to brush it. Then I got the UC cleaner, it also does a much better job. 

Those vibration based cleaners do work nicely, but they are not "ultrasonic".  The ones I know about, sold under the Audioquest brand and maybe some others, vibrate at around 500Hz.  That's why you can hear it.  I have the Audioquest version but use it rarely.

Clean all records upon acquisition.
One GruvGlide application per record.
Audioquest carbon fiber drop brush before every play.
Stylus clean once per listening session with one of those small round brushes going back to front. 
 

I'm surprised to see folks still using the Onzow product after the much publicized reports of it leaving a residue on the stylus and cantilever. Or has that been debunked since? 

I looked for any signs of residue after using my Onzow using my Wild-Heerbrugg microscope.  For those who may not know this is a very high quality microscope, one that McIntosh required their dealers to buy and have available for turntable service many years ago.  Audio Technica followed suit.  I actually own one of each as the two companies specified different models, M5 and M3 respectively.  At any rate, these microscopes allow you to examine a stylus in minute detail.  My conclusion was that I could not reach a definitive conclusion.  Certainly any residue buildup took a long time and many, many repetitive uses to form.  The occasional use of a liquid cleaner, there are many on the market, removed any residue.  I was able to form a residue using the Onzow exclusively, by waiting over a long period of time (months of daily use).  My feeling is that this is not the way the device is used in practice.  So whereas it is possible to develop a buildup, the user really has to be trying to do so, or be extraordinarily negligent.  I bought a new Onzow as mine was very old a year or so ago and have no qualms about using it.  I do think the new buzzy gadgets work better though.