Lyn
If you want an in depth appraisal of 'bonneting' go to the 'kleenkuip' web site, where you will find a great deal of discussion about the system - and others - particularly about oscillating machines, which have never migrated, so far, to the UK, but have a very big following in the States and Canada.
In spite of the negative posts, there are many who use these systems and swear by them, particularly in commercial work.
Some years ago, we experimented with Argosheen, which is from the originators of bonnet mopping and found the chemical to be excellent.
angie