Quoted from Wickerman2:this virus might survive on a surface for 30 minutes.
What is your source for that information? The WHO says otherwise:
https://www.who.int/news-room/q-a-detail/q-a-coronaviruses
“ How long does the virus survive on surfaces?
It is not certain how long the virus that causes COVID-19 survives on surfaces, but it seems to behave like other coronaviruses. Studies suggest that coronaviruses (including preliminary information on the COVID-19 virus) may persist on surfaces for a few hours or up to several days.”