Permissible and Impermissible actions in Ihraam

Q:

1. Can I wear sunglasses when making tawaaf for umrah and hajj? 

2. Can I wear perfume at the time of tawaaf for umrah and hajj?

Q: I would like to know what kind of slipper I can wear in the state of ihraam. Is it a must to wear a 2 belt slipper or I can wear the slipper which is open in the front and back?

Q: Can a patient who has a urine problem perform umrah by wearing a pamper (diaper) in tawaaf?

Q: If one wishes to wear a clean ihram while in the state of ihram, is the new ihram permitted to have a scent like a normal soap scent? Can one prepare ones second ihram with perfume?

Q: Is it permissible for a person in the state of ihraam to apply ointment for pain? The reason I am asking is that all ointments generally have a scent, whereas all scented things are prohibited in the state of ihraam. 

Q: I intend going for umrah. Due to my leg problem, I need to wear a compression sock. The compression sock covers the entire leg. Is it permissible for me to use this sock while in ihraam? 

Q: If one goes for umrah or hajj, and during the journey, his ihraam clothing becomes soiled, can he change into a clean ihraam, or is it necessary for him to continue using the same ihraam while merely washing the soiled area? 

Q: I have a problem of urine drops after urine and also upon waking up. Is it permissible to tie a tissue for example with an elastic band for istibra purposes then remove, and also to have a tissue tied under ihraam during sleeping to prevent ihram from being affected with the drops during sleep

Q: In the condition of ihram is it compulsory to only have 2 cloths. I have heard it is okay to take a spare set of ihraam and for example in a situation where the ihraam gets napaak can you replace it and wear one from the spare set.

Q: Is it permissible to kill a cockroach or spider found in one's hotel room in Makkah when in the state of ihram?