NASA has procedures in place to wash their space going equipment with hydrogen peroxide washes. Alas strains of Bacillus pumilus have been shown to survive these washes. I had a chance to work on these strains that had been on the space station in experiments to see how they responded to radiation etc there. The resistance to hydrogen peroxide in this strain is incredible. It was so far past resistant compared to the hardiest bacterial strains in the lab that it was off the charts. Life as they say...always finds a way.