The screw down clamps can fail by losing compression as the clamped material
(rubber) degrades.  The spring clips compensate for material changes
somewhat better as they are always applying compressive force through the
"spring" feature of their design.

I have two portable Halon Extinguishers handy by the driver door and the
sliding door.

Suppression CO2 foam might be the most effective although messy.

al