Quick additions that you can consider: * A default option whereby a visitor can ask question which isn't listed on a page. * A simple 'did this answer help yo

Quick additions that you can consider: * A default option whereby a visitor can ask question which isn't listed on a page. * A simple 'did this answer help you' under each answer. Like what Google does on its support pages. * Some basic stats like how many visitors clicked the help bubble and how many got their question answered. The three options above will provide you will insights whether you are answering the right question.