Innerworkings of Intellimouse? >:(

Does anyone know how to take a MS Intellimouse Explorer apart? I hav had mine for 2 years now and is is gettin gummy and full of grime inside. :P >:(
I cant tell how to take it apart since there are no screws or brads on the outside or for that matter as to how Dumcrosoft put it together in the first place.
I cant tell how to take it apart since there are no screws or brads on the outside or for that matter as to how Dumcrosoft put it together in the first place.
