1.Tee ihe nwere ezigbo ihe mgbochi ihe mgbochi, nke nwere ike igbochi mwakpo nke oxygen na gas ndị ọzọ nwere ike igbochi ihe ndị dị na mbara igwe;

2. Enwere ike iji karama iko ugboro ugboro, nke nwere ike belata ọnụ nkwakọ ngwaahịa;

3. Nke a nwere ike ịgbanwe agba na nghọta;

Mpempe osisi 4.glaịs dị mma na ịdị mma, nwee ezigbo nguzogide na-eguzogide na-eguzogide ọgwụ ọgwụ acidic (dị ka ihe ọ juiceụ akwukwo mmiri, wdg).