"When I am testing my form, it is filled with my previously selected inputs. How can I reset them?"
This is a feature, not a bug. We store the previously selected answers in the user's browser, so that if the user accidentally closes the tab, the already filled forms are prefilled to save their time and for better user experience.
That being said, it sometimes feels like an issue when you are testing your form and constantly filling it mid-way and without submitting it again. You will find that some of your answers which you have filled already are pre-filled.
To save this, you can append the force reload parameter in your forms. This will wipe out all the previously filled answers from your browser for that form and start from fresh.