How is the safest way to clear cache ?

Please help me!!! :slight_smile: Thanks already!!

I have a site that is not working properly. in fact it is a mess.

I do think it has to make with some child theme and conflicts between plugins and themes. I have to delete and again include some.

My questions is : how to make sure all deleted content is really gone? I want to be sure it is now clean. I am trying to bring myh site back but it is really confusing now. It does not work properly.

Any help is very appreciated.