Oh if I’m picking up food and I’m having a REALLY bad day and it’s loud I literally type it out and show them. But I have a habit of either hitting my leg or moving my arms when I get a block so learning a few words in ASL has actually helped me get it out. Thank you is just the one I use most frequently. I mean it might not work for everyone, but I’d give it a shot. Especially with signs that’s are more commonly known