Not being able to say 'thank you' so people think ure rude

Not being able to say 'thank you' so people think ure rude One of the things about stuttering that i hate so much is that it prevents me from being "polite". as much as i want to say "thank you", most of the time i cant do it. I went out recently and i had to say thank you to the cashier and i stuttered rlly bad. The mask makes it even harder for me because theres less air and less air worsens my stutter(im not an anti masker chill).