Modern dishwasher detergents contain abrasive grit that strips old Japanese gilding. Use mild liquid dish soap and lukewarm water.
The HD 333 series generally has a "V-shaped" sound signature (boosted bass and treble). While this is great for pop and rock, it might be muddy for podcasts or classical music. sone333 better
Is a typo for a specific product (like Sony audio equipment ), or is it a personal brand/username ? sone333 better