Cleaning interior

Hey,
I have currently run into a problem cleaning my black vinyl interior. The products I use to protect it (sunstop) seem to be causing streaks in my black interior. I need to protect the interior some how because I drive a vert in florida but in doing so I don't want to destroy my interior. Does anyone have any tips or products they use? Thanks.

I use Meguiars cleaner & protectant. No problems here... and they smell nice, too! :D