I have 5 gallon buckets for waterers that I put in my duck and chicken pens. I go out tonight and I find a five gallons worth of ice in my bucket! I of course can't get it out so I used a backup bucket I have but how am I going to get these ice blocks out of the buckets? I thought about coming home putting the waterers under a heat lamp for an hour or two and then changing it. good or bad idea?