It sounds like you may have one of the following problems, non of which are "stealth" problems, just usual problems with taking the kite down

1, not "going for it"; you need to pull the kite down as fast as possible, this means you should never pull it "up" into the snuffler, just "down" or mabe across into it.

2, Too much friction in the system(making 1 more difficult) - spray everything -sail, snuffler hoop and the spi it self the the stuff Rolf mentions above.

3, The halyard / downhaul is snagging within the sail as it comes down; if you have a sail that has grommets in it (holes) it may be that the sail is bunching too much; a good trick is to put rope thru the holes with a small stainless hoop one end and a stopper ball the other so the downhaul goes thru the hoops. This means the downhaul is just ONE side of the sail and has less drag.

Take some pictures when you try this on land (it's good to practice this on a light wind day on land, so you have time to actually whach what is happening.

Also, make sure you tape EVERYTHING that MIGHT catch; tape up all the terminals of any wire rigging in the area, tape up any fittings. Spray this all too!