Dust and cobwebs prevent paint from sticking. A quick wipe with a damp cloth or microfiber mop makes a huge difference.
Paint the edges, corners, and around trim first using a 2-inch angled brush. Only cut in one wall at a time; you want to roll your main area while the edges are still wet to avoid "picture framing" (visible lines between the brushed and rolled areas). Dip the roller into the tray or bucket screen. How to roll a wall like a pro
Use a work light at a side angle to spot any "holidays" (missed spots) or drips before the paint dries. Dust and cobwebs prevent paint from sticking
Without lifting the roller, go back over that "W" with vertical strokes to fill in the gaps. This ensures even distribution without overloading one specific spot. 5. The "Lay Off" (The Secret Step) Only cut in one wall at a time;
If the roller is heavy or sliding, you have too much paint. If it’s squeaking, you have too little. 4. The "W" Technique