Dumb things that you did.......because you didn't know any better.
I'm sure we all have a story or two like this.
When i was 17 and working at a tire shop. we had this stuff call "Murphy Soap" it was this thick gooey Grease looking stuff that we would put around a tire bead that wouldn't seal up.
One day after work, i decide to re pack my front wheel bearing in my car. 72 Demon with a slate and a 3 speed on the floor.(sure wish i had that car now)
I decided to pack my bearing with this Murphy Soap.(Ignoring the word SOAP!)
It was a Saturday after work, and even put new seal in.
Then decide i was going to visit my older brother that lived some 60 miles away. Made it all the way there with no problem. Spent the night there, and when i when to leave in the afternoon. there was bad noise coming from the front end.
My brother had to take me to the parts story to buy new bearing and seals..... and a tube of real Grease!