May Allāh forgive me, I used to very frequently look at inappropriate things and do the secret habit and even though I’ve quit I still have disgusting images, thoughts, and sick imaginations in my head and I hate them all so much. How can I be rid of these sick thoughts I have in my head?

Ustadh AbdulAziz al-Haqqan

Continue upon goodness and they will go with time in sha'a Allah just never fall into this again.