I have a humi with glass top and 2 glass windows in front... I found these silicone ear plugs at the drug store that you can roll out into little strips. Odorless, clear, easy to work with and cost like $2 for 12 plugs. I didnt even use 6 of them to seal it all up...
Here they are.. I got them at CVS
http://www.macksearplugs.com/pillow_...e_earplugs.htm