Have a similar situation although to a lesser degree with the black toner in my 3110cn - it is constantly leaking toner out. Support suggested that I use conpressed air to blow it all out. Not keen on toner all over my home office. Going to try compessed air and a high powered shop-vac.
Support suggested you use compressed air and *blow* it out??? I hope they told you to wear a mask as toner is hazardous material in your lungs. You should also never use a regular vacuum, only a toner vacuum for the same reason...you don't want the vacuum's exhaust throwing it into the air and a toner vacuum has a Hepa filter in it. I know this is an old post but hopefully it will help someone else who's in the same spot. I read the post because my 3100CN also leaks all colors of toner all over the place.