I've tried diluted vinegar myself—just a quick soak in about half water, half white vinegar—and it worked pretty well without causing damage. But I totally get your hesitation; retainers aren't cheap and it's normal to be cautious. Retainer tablets do make a noticeable difference in freshness compared to just soap and water, in my experience. They're reasonably priced if you go with store brands or bulk packs online, so you might find them worthwhile for peace of mind.
I've been hesitant to try vinegar myself—something about the acidity makes me nervous, even diluted. Retainers are pricey, and I can't shake the worry that vinegar might weaken the plastic over time. Toothpaste sounds safer, but then again, I've heard some brands can be abrasive. Has anyone noticed if certain toothpastes are gentler for cleaning retainers than others? I'd love to find a reliable alternative without constantly second-guessing myself...
I've had the same worries about vinegar—just feels risky with something so expensive. I switched to a toothpaste labeled "gentle" or "for sensitive teeth," figuring they're probably less abrasive. Been using one for a couple years now, and my retainer still looks good. Just avoid the whitening or baking soda types, those seem harsher. Honestly, a soft toothbrush and gentle toothpaste combo has worked fine for me without any noticeable damage...so far anyway.
Glad someone else mentioned the gentle toothpaste approach—I was wondering if I was being overly cautious, lol. Have you noticed your retainer staying clear too? My kiddo's retainer got cloudy fast using regular toothpaste, but switching to a sensitive formula really seemed to help. I agree about the whitening stuff...it feels gritty somehow? Anyway, sounds like you're doing great—two years without issues is pretty reassuring.
Yeah, gentle toothpaste is definitely the way to go. Regular stuff made my retainer cloudy too—switched to a sensitive formula and it cleared right up. And totally get what you mean about whitening toothpastes feeling gritty...it's weirdly abrasive somehow. Glad I'm not alone there, haha.