How can you reuse a can of "Great Stuff" expanding foam by Dow?

I’ve never been able to—didn’t think it was possible. I avoid using it until the job requires close to a full can. Be sure to wear gloves & old clothing. I’ve also had a fair number of brand new cans from which nothing came out the nozzle. Maybe they should call it “Not-So-Great Stuff”.

I’ve reached a similar outlook on the stuff: wait until you’ve got a lot of gaps then run around quickly getting them all.

Gloves are very important, agreed. You’re right too, they should call it something else, like “Might be crappy stuff”, or “OK stuff”

No luck, here, either. I vote for Messy Stuff You’d Rather Never Use Again, But Probably Will.

First have extra tubing or straws. You’ll need a spray bottle of goo-be-gone, with the citrus in it. After you use it, remove the nozzle and straw. The straw gets thrown away. The nozzle gets cleaned with the spray and a nail. The pop of the can, the stem gets sprayed down and a nail put into it to help clean it out. Leave the stem of the can full of goo-be-gone, and tape it off for long term storage, to trap it in it. Always reuse the old nozzle on a new can, and save the new nozzle for when the old nozzle can’t be used. You can also attach a tube to the stem directly and if desperate and willing to use the rest of a whole can, puncture the stem by hammering a nail down into it, but more simple, I’ve so far found the citrus goo-be-gone and a little cleaning to be sufficient to reuse the cans, though I have yet tried long term storage, just a day or two.