Not a ‘tip’ exactly but I picked up one of those Griot’s Garage synthetic clay bars last week. My car has about 30 year old paint on it, I waxed it over the summer but you could still feel quite a bit of ‘drag’ when you ran your hand across it - so I knew this Winter I would need to clay bar it.
The bar itself is more like a ‘puck’ which is nice, not the actual old gummy Clay.
Here’s a few photos. I enjoy cleaning my car, I’m not a geek on it. Is there something out there that’s better? Maybe. Probably. But for the average DIY guy the price and result was 5 stars in my book.