I feel your pain, same thing happened when my 5 year old niece came over. Pushed in all the dust caps on my qs8s and almost all the caps on BOTH M60s. Needless to say I was not amused.

The vacuum tip worked like a charm for me. Fortunately, the dust caps have no bearing on performance but I understand wanting your speakers to be perfect.

As Randy said, can you try another vacuum cleaner or another hose attachment?