i purchased a Shark Rotator Powered Lift Away vacuum model #ZU632 26. 1) what setting do I use for a berber looped carpet so loops don't get pulled apart. rep at Shark said that vacuum cannot be used on Berber or loop pile but was sold to me as being able to be used on loop pile. 2) really hard to vacuum cut pile carpet. Shark is pulling up carpet fibers. I used middle setting. low pile. It really hard to push and making lots of wheel marks in carpet and pulling up fibers. The carpet is Anderson Tuftex cut pile. what setting should I use for this carpet? 3) does hardwood floor setting have "Beater off" or "suction only" User's recommendation: dont buy this vacuum. return policy or customer service is terrible.