hi there, sorry we did not come up to scratch during your visits, it does get dirty and dusty very quickly and we do clean daily, its not possible to do all of it during the day single handed, whilst children are playing so generally a section at a time, but muddy shoes, parents allowing their children onto the paly area with food in their hands !! etc and all our hard work is undone in an instant.. however I feel we could do better and have implemented a better regime ..all balls have been sterilised and continue to be done in batches on an ongoing basis...thankyou for your comments, most appreciated, please make your self known if you choose to visit again and I'll treat your grandchildren to a Free Play.