Here are my thoughts
1. 2L is too small. I think 3L works about as well as 6L, but you'd need to change the cleaning solution more frequently.
2. From within the US, I'd go with something in the $100-$150 range from Amazon. The brand doesn't seem to matter much; they are all pretty much the same. I would strongly recommend looking for a unit with a drain valve at the bottom -- mine doesn't have this and I really wish it did!
3. TSP for sure. Oxi-Clean defeats the purpose of an ultrasonic cleaner.
4. 30 seconds to 3 minutes, depending on what type of chip you're cleaning and how dirty it is. Lightly used RHC are super fast; super-grimy LCV take a lot longer. Keep the temperature around 100° F or 40° C -- otherwise you risk damaging certain colors. Watch out for pinks and purples, especially. Water that is too hot will fade them permanently.
5. I like to presoak chips in room-temperature water, just to get them wet and start softening the bigger chunks of grime. Don't use heat or detergent on this step.
6. Yes, lots of rinsing. I like to lay out about 20 on a old towel, pat with a towel to get the big drops of water off, then lay them out on another towel for 24 hours or so to let them dry fully.
1. 2L is too small. I think 3L works about as well as 6L, but you'd need to change the cleaning solution more frequently.
2. From within the US, I'd go with something in the $100-$150 range from Amazon. The brand doesn't seem to matter much; they are all pretty much the same. I would strongly recommend looking for a unit with a drain valve at the bottom -- mine doesn't have this and I really wish it did!
3. TSP for sure. Oxi-Clean defeats the purpose of an ultrasonic cleaner.
4. 30 seconds to 3 minutes, depending on what type of chip you're cleaning and how dirty it is. Lightly used RHC are super fast; super-grimy LCV take a lot longer. Keep the temperature around 100° F or 40° C -- otherwise you risk damaging certain colors. Watch out for pinks and purples, especially. Water that is too hot will fade them permanently.
5. I like to presoak chips in room-temperature water, just to get them wet and start softening the bigger chunks of grime. Don't use heat or detergent on this step.
6. Yes, lots of rinsing. I like to lay out about 20 on a old towel, pat with a towel to get the big drops of water off, then lay them out on another towel for 24 hours or so to let them dry fully.