Is it safe to use eucalyptus oil on a humidifier to for baby to help him breathe properly? also, what remedies can you suggest for a clogged nose?

No fragrances : The first months are complicated by narrow nasal passages which swell/close if exposed to dust,fragrances, smoke & other irritants.Baby tries to flush these out of the nose with mucous but this often ends as congestion & produces rattling with breathing.The best rx is washing out the nose with saline & suctioning the remainder. Eliminate irritants from babies environment & this will happen less.