Take a look at the thread "Video of a CO2 hit"
http://www.rebreatherworld.com/rebre...o-c02-hit.html
The message is clear: once the scrubber comes out of the 'breather it goes in the bin; do not attempt to load it back in later. Leave the partially-used scrubber in the can till your next dive. If the next dive is more than a couple of weeks later you might consider pitching the scrubber - but with a new 'breather to dive you're unlikely to want to go that long without a dive anyway!
Dive safe and enjoy,
Nicholas