How disappointing. I won't spare you with a short recap, but, suffice it to say, TheCrazyChemist saved Things2do. Another accusation for him. Oh boy.
Here's my next target:
ieqr mvudc jgikfi
You seem to have figured out one of these in the past, but I've added another layer. Blaise (although it was really Giovan) will be able to help you with this one again, at least for the first steps. This clue is rather like a matryoshka doll. On the outer one is a depiction of the local top dog. The inner one has the name of H.J. Potter's nemesis.
If I use a key of "bernard", I get "haze mercy stitch". Bernard being one of SciOly.org's 'top dogs', of course.
It is legible words, but I don't know what it means.
2018: Hovercraft, Thermo, Coaster, Solar System
2019: Thermo, Circuit Lab, Sounds, Wright Stuff
2020: Circuit Lab, WIDI, Wright Stuff, Machines
It's not science if you don't glue your hand to it at least three times.