Why was Auschwitz not destroyed by the Nazis to hide evidence, but camps like Treblinka and Westerbork were?

Question

Why was Auschwitz not destroyed by the Nazis to hide evidence, but camps like Treblinka and Westerbork were?

In: 151

Answer 1

The extermination camps built latterly like Treblinka and Sobibor were smaller by a huge degree and some of the final destruction was carried out by the Soviets.