New Canadian currency melts?

I bought canadian money in canada last month. the rate was 110/100 so I should have recieved 110 can for each 100 am. Not so every bank I went to wanted a 7% cut out of the exchange. They gave me 103. I went in Alberta and again in Whitehorse same deal. I actually got a better exchange at wallmart in Whitehorse. That was like 105. I found the best exchange was just using my credit card. They gave the full 110 with a small like 50 cent surcharge. ANy of the canucks would gladly take am money at a 50/50 rate. Live and lern I guess. When I tried to pass the can money in Alaska they would only give me 90 cents per dollar. When I bought the money at the bank in canada the teller told me not to leave it on the dash or in a hot location as it could melt the bills together. She claimed to have witnessed this.