Answered by Ustadh Tabraze Azam
Question: As salaamu Alaikum waramatullahi wabarakatu
1. My inlaws have dogs in their house and because of this I hardly visit them like I should. When they come to visit, I end up cleaning the floor, beddings and any seating they used. Do I need to do this cleaning? Is it excessive?
2. Whenever I have marital relations with my wife, I wash all the beddings and blankets. Sometimes no fuild will be on the bedding, yet I end up washing  it anyway. Do I need to do this?
Answer: Wa alaikum assalam wa rahmatullahi wa barakatuh,
I pray that you are in the best of health and faith, insha’Allah.
[1] If you are sure the dog’s saliva affected something, then you should clean it. Otherwise, the basis is purity. In difficult situations, you can follow the Maliki position which doesn’t consider the saliva of a dog to be filthy. [see: Can I Pray in Clothes That Were Licked by a Dog? and: Dog Saliva, Dog Hair, and How to Purify Impurities]
[2] No, unless there is obvious filth present, you do not need to do anything.
Please see: A Reader on Waswasa (Baseless Misgivings)
And Allah alone gives success.
Checked & Approved by Faraz Rabbani

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