I have never cleaned a new solder sucker.
There are two (three) thoughts on the use of tools. (and guns)
Clean before use or clean after use.
1)Some people leave their tools in a dirty state and only clean then just before use.
2)Some people clean their tools after use so they are ready for use another day.
3)There is the rest of the people that only clean a tool when it is so dirty that it will not function . Clean after it stops functioning four times.
The above goes for solder suckers, guns, air driven tools and sex.
Gentleman (and ladies) please clean your tools.