How long do I need to steam a surface to effectively disinfect it or eliminate germs and pests?

Just 2 seconds. That's all the contact time the AURA needs to eliminate:

•    99.999% of viruses and bacteria — including SARS-CoV-2 and Adenovirus type 5
•    100% of dust mites, lice, and bed bugs — eggs, nymphs, and adults
•    99.99% of mould and fungi

These results are verified by independent accredited laboratories. In practice: move the steaming pad slowly and steadily across the surface. You don't need to scrub or hold it still — the 2-second contact happens naturally as you pass over each area.
Focus where allergens hide most.  Mattresses, pillows, sofas, and children's soft toys harbour the highest concentrations of dust mites. Monthly treatment makes a measurable difference for allergy and asthma sufferers.