Editing digital glitches

I've searched far and wide.  Maybe my terms are wrong.
 
Anyway, what are some of the best ways to remove digital glitches from waveforms in Sonar X? 
I've done the highlight/reduce gain thing to varying degrees of effect.  It has never removed one completely.
 
I also wish it would snap to zero crossings whenever I select a section.  I can't set it to do that, but used to in Sonar 8.
 
Any ideas?  My glitches are typically like square-wave spikes in the middle of a single wave, reaching to the top of the waveform amplitude.  Other times they are mis-fit jagged connections in a wave -- typically at the zero point or nearby, with one side higher or lower and a discontinuity that clicks.
 
I have hopefully learned how to minimize these, but I have editing to do on ones that exist now.
 
Thank you!
 
Jonas