These rugs are not a problem to clean.
The reason they go wavey is that sometimes they have a cotton band running under each side along the length. This shrinks and causes distortion and the edges can curl up.
I always inform the custy of this before cleaning. I picked one up today and said the same.
Custy said ...yes, we washed one edge once and it curled up.
In retrospect...there are now wool rugs which are becoming popular which have a cotton banding along the edge. Stay well clear!
I cleaned one of these and warned custy I could not clean the edge. She said can you take those marks out of the banding. I said yes at your own risk. It curled up where I had cleaned it! What if grandma trips over and needs a hip replacement
