Make sure the air intakes underneath the Glowforge are clear and open for a good flow through. Double check every length of the hose, especially at connections. Many folks have switched to a different hose that is a bit more substantial because the supplied hose can be somewhat fragile. Make sure the exit part of the hose does not block the flow.
In my experience, when I smell the exhaust, there is some type of leak or back flow. I have a very short run that’s almost straight. I’ve had no problem with long acrylic jobs or leather even and my setup handles it.
The following post is masterful in examining the issue, if you haven’t seen it.