How to reset HomeKit?
Solution 1:
Here's a solution from How To iSolve:
Step 1: Go to “Settings”.
Step 2: Open “Privacy” and tap on “HomeKit”.
Step 3: There tap on “Reset HomeKit Configuration”.
Step 4: Finally hit Confirmation Tab to finish the process.
However, I recommend reading the solution through, you might not even need to reset your HomeKit.