Removing all the paint you can with old newspaper will make your roller and tray easier to get clean without wasting a lot of water or filling the drain with paint.
Keep the bottles and tins until you have washed something that is too delicate or too large for the dishwasher, and wash them in that still-reasonably-hottish-and-soapy water. If they are likely to dry out and be more difficult to wash, fill them with water before you let them stand.
Also leaving ANY dirty dish to soak can mean you use less water and detergent getting it clean.
Ah dear - why does getting older equate to diminished brain power?
Is Trump's Pointless War Still Rattling On And On And On.......



?