A good idea at this time of year to check every day for the start of infestations in one's greenhouse.
After seeing to the greenhouse, it's always nice to have a mug of tea. Afterward, it's handy that I keep my greenhouse stash of dilute soapy water in a spray bottle. It's very good at helping to keep one's mug clean and is fully "certified" all over the planet for use on cleaning every single implement we use for food, unlike many chemicals used in today's pesticides.
I also garden as "sustainably" as possible, with a regard to my plot ecology and it's pests and friends alike, well, well beyond the soil association "organic" brand, that these days actually allows the use of chemical pesticides and fertilisers. I wonder just how sustainable some of these legal pesticides are.