We have a 5-gal bucket from Menards, using the horizontal water nipples. The bucket developed a hairline crack just under one of the water nipples; the crack goes from the drilled hole, straight down. This is the second time this has happened to us in the past 12 months. It seems like our buckets last about 6 months, and then develop a crack. Should we be using a different type of plastic bucket? We like the water nipples, but are getting frustrated with the repeated leaks developing. Thanks in advance for your help.