why though? it was a machine part of queen th at was on fire
coz sanji's all flesh innit what's self-contradictory is that if you assume Queen used fire in the sense like DJ.. then why would he ask that question if he knows germa abilities..
the fact that he assumes its a machine like his, plus the fact thay he said he delved into germa tech.. should mean sanji's (which we know) not a machine and the ability is not germa
beside during his showcase of germa abilities he used sanji's stealth.. and not fire
sanji's fire is still a mystery