Hmmm, dear cleaning with dettol with not help in this case. The virus does not stay outside the body but rather finds its way in... how long ago was this incident? If it is still less than 5 days you can go to a govt hospital and ask for what is called PEP. Its not easy to find but that's one way, It is a course of medicines one has to take to reduce the risk of possible transmission. Am sorry beta, but there is not much that we can say. https://lovematters.in/en/resource/hiv