Is it permissible to pray on a wet prayer rug underneath which there is dry impurity whose trace has been removed, according to the Maliki school of thought?

There is no objection to praying on a wet prayer mat beneath which there is dry impurity whose trace has been removed, according to the majority of Maliki scholars. They hold that impurity does not transfer if its trace has been removed by something other than pure water, and then a wet object comes into contact with its location. Similarly, it is permissible to pray on a pure prayer mat beneath which there is an impure covering, according to the Maliki school and some scholars, though it is disliked.