How long do these hoses usually last? Our Pool Sweep 360 pressure side is about 3 years old. Lately I’ve been having to shorten my hose little by little coz it keeps cracking near the beginning of the hose. Should I replace the just 1st portion that keeps cracking or replace the entire hose? I see they sell 72-inch replacement hose (Zodiac brand) on Amazon for about $15. Also, see the full hose kit for about $115.