@ElsieDi would just search on utube for a demo of how to use a canister…there are tons of them and they are very good. I think I got mine at Superstore or Great Canadian Wholesale Club if you have one near you…or Amazon.
good luck.
just charge the cylinder with the cream in it and store in fridge. Use it as many times as the cream lasts then disassemble and clean. That’s it. I do clean the tube the cream comes out if after each use but that is minor.