How often should I floss during clear aligners treatment?

Floss at least once a day during active clear‑aligner treatment, and when practical floss (or use another interdental cleaner) after eating before you reinsert your aligners. This aligns with standard dental and orthodontic patient guidance to keep food and plaque out from between teeth while you’re wearing removable aligners. [1, 2]

Quick takeaways

• Floss at least once daily during treatment.
• If you eat while your aligners are out, clean between teeth before putting them back in when practical.
• If traditional floss is hard to use, interdental brushes or a water flosser are acceptable alternatives. [1, 2]

Why once a day is recommended

Professional dental guidance recommends at least daily interdental cleaning to remove food and plaque; that general oral‑health recommendation applies during active aligner treatment too. [1]

Orthodontic patient instructions emphasize brushing and flossing during treatment and advise cleaning after eating and carrying floss or interdental brushes while in treatment; these are practical hygiene steps to follow when using removable aligners. [2]

Practical options for cleaning between teeth

If traditional string floss is awkward while you’re managing aligners, accepted alternatives include interdental brushes and water flossers; the ADA lists these as reasonable interdental cleaners. [1]

Align Technology’s patient resources say you may remove aligners to brush and floss as part of normal daily oral care, which supports briefly pausing wear for hygiene when needed. [3]

Practical routine and Smilo use

A simple routine is: floss once every day (for example, at night), brush after meals, and when you remove trays to eat, clean between teeth before reinserting if you can. [1, 2]

Smilo can help you track wear time and tray changes so you can log when you removed trays for meals and note that you completed the supported cleaning steps around those events.

Limits of the evidence

The cited sources are professional and manufacturer recommendations for oral hygiene frequency; they do not contain randomized or observational studies that directly measure how flossing frequency affects aligner tracking, treatment duration, or tooth-movement outcomes. [1, 2]

Given those limits, the narrowest supported guidance is to follow standard daily interdental cleaning and, when practical, clean between teeth after eating before reinserting aligners. [1, 2]