Do they suggest that you pay in your home currency, or do they give you the choice to select on the ATM? Only once a cashier made a suggestion and it was to warn me of the spread and that generally it'd be better to do it in USD and let my bank do conversion.
You get a prompt on the terminal. I’ve never had a cashier suggest anything to me, and I don’t really want their input. The correct answer is always pay in local currency and let your bank handle it.
I once came across a cashier that thought you had to select the foreign currency option. When I tried to pay in the local currency she cancelled the transaction.
Needed to get another member of staff to explain to her that the local currency option would work fine.
