Next month I'll have 1 year with my ES4 (my first IEM) on December my EDX Pro will also join and on January my TA1 and SSP will too, after that the rest are not that old.

The ES4 still going but I don't use them since my TA1, SSP and SSR are just too good daily drivers for my needs so I just stopped using them since May, on January I passed the EDX to my sister (because I gifted her some BLON-03 on Christmas but she lost them) and still going strong, the TA1 is also working.

As for Moondrop, all my 4 (soon to be 5) Moondrops all still work just fine, SSP and SSR doesn't have the inner paint anymore, my Nekocake Achy Acht still working (although the silicone case started loosing some small letters) and I'm babysitting my Starfield, I would love to daily drive them but I fear someone would try to steal them on the public transport so I'm being extra careful with them, I'm waiting my blue Kato to arrive.

I clean them with facial degreaser (micellar water) and wipe them with cotton, if you use alcohol you're risking yourself to mess with the glue on the filters and in the long term they will fall off and also damage the paint, after that I store them on their cases with a small silica bag and let them rest over night, never had unbalanced issues even though sometimes I use my SSP while exercising and they are still working, planning to get some Chu to see if they work as well as the SSP, got my suspicions that some people don't take care of their personal stuff.

Edit: planning to get some car PPF for the Starfield although I doubt it would be any help because the Starfield paint issue it's because of small impacts (like hot wheels), thinking to also add the PPF to the Chu test alongside with an acrylic paint coat and MMCX reliability.