Product review (1 stars): are there rocks inside this drum?
as the drum is spinning it is making a grinding noise like there is rocks inside.  Now the thing won't turn off even though the knob is in the 'off' position.  I am guessing I got a defective model.  A new one was on the way but I've cancelled the order; I read some other review where others had the same issue.....not interested in replacing.  Will arrange for Amazon to have UPS pick this up.  Amazon customer service great....just not the product.