Hi,
I've read a few drying out drone threads, and the use of rice.
I used to work in gas production (by machine ;)) where we use desiccant, plus airflow and heat. And many years ago, I worked with dry cleaning.
Has anyone tried 100% alcohol...
it works but not by just pouring it over the drone..... you need to take the drone apart and throw the pieces in an alcohol "bath" . It helps displace the water, Not dry the water out.
Once the water has been displaced the board will dry...
I've not used the Mavic 4 however on the Mavic 2 Pro the only time I've had problems with false alarms on the collision sensors is around sunset time or there's harsh light angles. At night time it warns the avoidance system isn't working which...
They can't stop you from flying over, they can stop you from launching, landing or controlling the drone from their property. If you launch from outside campus - and have VLOS throughout the flight - you're fine.