Ok my sun roof was haveing trouble opening and closing so I put white lithium grease on it and it worked perfect for 2 days. Today I went to close it and the back is coming down before it should and scratching my roof. It slides almost shut then just stops no noise or nothing. Leaves about a quarter inch gap in the back. Please help it raining. I stuck my spare tire on it to kinda hold it closed. Any help on how to fix will be greatly appreciated.