They are 2 years old , I do clean them and lubricate them with wd40 or silicon spray but you only have to reel the hose in once to have them covered in grit . The chunks Brocken off is due to the clips on the joiners between the microbore and the pole hose I found after the first couple of days that they chipped it works well but the rollers arnt really up to the job they arnt good quality , I keep looking for something similar size but better made haven't found anything yet , I find them noisy too due to the very poor tolerance between the roller and the shaft there's a lot of p,any in them