What should you do If you cant' clean a place that you made unclean? If you for example step with your dirty shoes on a carpet or maybe put your dirty shoes on a chairseat but are unable to clean it because you can't enter that place anymore. I am scared that someone puts their hand or clothes on that place where I put my dirty shoe and that they get dirty and when they are going to pray their salah is unvalied because they touched dirt. What should I do I can't clean that place, should I make dua?
Not everything dirty is considered Najis. And if there is no Najis under the shoes, there is no problem with his prayer if he touches them. Even if a place is Najis and someone who does not know touches it, their prayer is still valid.
Also, if you cannot clean there, at least inform the owner or people there so they can clean it. the questions should be cleared more but if the place or thing that has became Najis is usually used for prayer or some action that being Najis makes that action invalid so you should inform the owner. otherwise not necessary to inform.
If something Najis touches the carpet, it can be cleaned by pouring water on it several times and collecting the water.