A:AnswerThe filters are washable and do not need to be replaced unless damaged. The user manual says you should only wash the filter with water. I do not believe you are supposed to soap as it can leave residue.
A:AnswerYou can only remove the fluffy roller on the front which requires regular cleaning.
The back roller is not removable. However, I have never needed to clean the back roller as it’s self cleaning.
A:AnswerI'm not sure what part your asking about but Shark usually has replacement pieces for all parts of the vacuum. Maybe try asking them at the customer service number for Shark.