It is written in Fatawa Haqqania: “If the cloth is clean and only dirt and filth was removed by dry cleaner then it does not affect the purity of the cloth. However, it is necessary that no impure cloth was put together with some liquid agent. In case the cloth is impure and it is absorbed completely in petrol then the cloth shall be pure in this case as the nijasah (impurity) of cloth may be cleaned by any liquid substance. However, if the dirt is dried due to the temperature while the cloth is impure then the cloth shall remain impure even after the dirt is removed and it shall be necessary to wash it with water again”.
قال الحصكفى رحمة الله: يجوز رفع نجاسة حقيقية عن محلها .. بماء ولو مستعملا به يفتى وبكل مائع طاهر قالع للنجاسة … كنحل وماء ورد الخ (در مختار) فتاوى حقانيه /576
Allah knows Best!
Darul Uloom Deoband