How can one get rid of the defilement obsessions resulting from masturbation and purify the home, appliances, and shoes? Is there anything that reduces desire? Are repentance and prayers accepted despite these obsessions?

Your cure lies in being mindful that Allah is watching you and is aware of you, so you refrain from committing sins out of shyness before Him. Allah Almighty says: "And He is with you wherever you are, and Allah is Seeing of what you do." Avoid everything that incites desire. Take the initiative to marry if you are able; otherwise, fast frequently. The Messenger of Allah, peace and blessings be upon him, said: "O young men, whoever among you can afford to marry, let him do so, for it is more lowering to the gaze and better preserving of the private parts. And whoever is not able, then let him fast, for it will be a shield for him." Associate with the righteous. What you imagine about everything in your home being impure is baseless talk and whispers from Satan. The fundamental principle regarding things is purity, and the preponderant opinion is that semen is pure.