While there may be a slight smell after opening the lid, I do not experience fumes or any indication that there is a leak with my setup. Folks have done lots of work documenting how they ensure good exhaust containment, so read up on the links @geek2nurse posted.
First remove your vent hose, get a flashlight and check that the exhaust fan is not clogged. It needs attention from time to time.
When you put it back on, ensure that your exhaust hose is firmly seated on the ring. That is a short surface for attachment. Many folks get screw clamps to replace the ring, spring clamps. Also, many get better exhaust hoses that are less prone to micro holes in them.
@chris1 has a particularly inspiring description of his venting effort.
Here is another one to give you some ideas.
One way to check for leaks is during a print, cover the lid of the Glowforge to cut down lights (only the lid. don’t want to block an intake air, including where lid glass edges are.
Darken the room and get a candle to see if anything escapes from your exhaust port.
Minimize your bends. Double check for leaks all through the system.
Many people are turning to supplementary or replacement inline fans which can be quieter and controlled so that you can keep exhausting the bed area longer to evacuate smell.
Maybe you can post pics of your venting setup and we can see if anything is amiss.
Some folks have containers or bags to put scraps and freshly cut materials to minimize lingering smell.