Question have hard time cleaning out the dust trapped under the keys

[brannsiu]

I bought a can of compressed air a few days ago as recommended and blew out the dust and debris
trapped in the keys of my keyboards but I have hard time blowing them out, they just moved from one
side to another but most of the dust was still trapped.

I really want to clean all dust out because my typing experience is affected, now I often need to re-hit
the keys....probably due to debris trapped

Any advice on blowing out the dust??

 

[velocityg4]

I use a vacuum with duster attachment.