bottom line: let me know some cute nice polish sentence i can say in a shop to make the shopkeeper feel easy- pecially if uve lived in britain for a while u would know what i mean!
They are there to work not to chat with the customers.
But just you know try to be nice to some grannies who sell me out me fags and some other things on a daily basis!
Maybe stop to be nice if they are not nice to you.
I have seen it that Poles accept only Polish jokes as of now because of there historical thing which comes out first when they say why ain't so much developed but to be honest they ain't a muslim country or whatsoever
What does it has to do with "sweet words to use with shopkeepers"? With such an aproach you won't make many friends.
In shop you are not expected to chat with shopkeepers. They are in work, you're strangers to each other, and you are supposed to be served quickly at the till to make other people wait less.
What you can say is simple "dzień dobry/dobry wieczór" when you apprach the cash desk (not "hello"), say "proszę" when you pass the money, and say "dziękuję" when you are given a change or... a hamburger (in bars). That's all. If the shop is small then you say "dzień dobry" when you enter it and "do widzenia' when you leave it. They don't have to answer you if they are busy.