SmartThings WebCoRE Piston alert only once an hour

Question

I have a WebCoRE piston that looks something like this.

if
   Device temperature changes
then
   do   Send SMS notification "Test message" to 1234567890;
   do   Wait 60 minutes;
else
end if;
end execute;

The Device temperature changes every few minutes, but I want to get notified of that only every hour.

I thought that the "Wait 60 minutes" line would do that trick, but I continue to get a text every ~5 minutes.

I can't find an example of how to get the desired behavior.