I have a few spacesavers and a classic. The classic had its usb cable replaced due to flakeyness in that cable and the spacesaver had one cleaning cycle (remove keys for washing, vacuum and clean baseplate).
Disassembly was easy. No glue anywhere, unless you mean the plastic rivets that bond the baseplate to the foil and keys?
In seeking the unattainable, simplicity only gets in the way. -- Epigrams in Programming, ACM SIGPLAN Sept. 1982