You can also do this with a microfiber towel using the same solution in the bottle. Just like everything else in life, use a lot of the lubricant and the bugs will all come off... (man that sounds weird)....
If you just soak a microfibre towel and soak the bug for a fairly short time it wipes off fairly easily.
At least that has worked well for me. Please note, I have a ceramic coat which may make it easier.