You can re-pressurize with an air compressor. There's YouTube on it.Over the years I have been throwing out my WD40 spray cans when they run out of air pressure. I woke up one morning with an idea and it worked. I made a hole with the pointy side of the bottle opener and saved the WD40 in a jar. I use it to take off the tree insect glue from my hands. That stuff is really hard to come off without WD40.
View attachment 4140081