You can use your own icon (a PNG or JPEG image file) for your Extra on the cleaning booking form:
Launch27 does not let you permanently delete an Extra, but instead lets you archive it. Go to Settings -> Extras Click the Settings button (gear icon) next to the Extra you want to delete [...]
Go to Settings -> Extras Drag and drop an Extra to a new position in the list Your Extras will be displayed in your Booking Form identically to how they appear in this list.
Go to Settings -> Extras Click Add New Enter values for Name and Price. Click Save.