On 3 June, Rob Midgley, Global Quality and Technical Manager with Shell Aviation, hosted a webinar for customers addressing the technical challenges and developments in the industry around the problem of microbial contamination of fuel in grounded aircraft. The webinar covered the science of microbial growth and available options to help anticipate, prevent, and treat contamination. This is a transcript of Rob’s Q&A with customers on the webinar. It has been lightly edited for clarity.