Frequently Asked Questions

How long does a head last?

Our multi-use Floss heads are made for just that, multiple uses! They are intended to be used until worn, but we recommend changing them every week.

Slate heads are reusable just like your toothbrush, just rinse & dry.

What is your floss made of?

We use woven floss with 450 strands. It is not coated and doesn’t contain any chemicals. It is ultra-high molecular weight polyethylene, and it is teflon-free.

Can you use with a lingual bar (permanent retainer)?

The Slate Electric Flosser, at this time, cannot work with a permanent retainer. You can, however, still use it on your molars, where most cavities form.

How does the braces head work?

The slim arms on the floss head go between the wire and the tooth.

Can you use the Slate Electric Flosser with a bridge?

The Slate Electric Flosser, at this time, cannot work with a bridge. However, stay tuned, as this is in the works! 

How to connect a new floss head:

To connect a new floss head, slide the top of the flosser neck up through middle of the floss head and press firmly on the back of the tongue scraper until it snaps in on both sides (make sure the interacting logos on the flosser and the floss head are both pointing upward).

How to remove your floss head?

To remove a floss head, place your thumb on the back of the neck just below the tongue scraper and press down firmly on a hard surface until it pops off.

The button is not turning on. What should I do?

Please be aware of the blue plastic label while changing the batteries. First look to see if the blue shim is stuffed in the top of your unit when changing the battery. There is a chance the blue shim stayed in the flosser during the changing of batteries and got shoved up to the top of the unit, preventing the proper electrical connection. To prevent this from happening to you, please make sure that when you change the battery, the blue shim comes out and you replace the current batteries with Duracell, Kirkland, or Makers Mark batteries. 

If, after you have done the steps above and the button still will not turn on, please email us at and we will exchange your button or product free of cost

Is Shipping Free?

We offer free shipping on all orders over $39.99 and all subscription orders in the United States. For all other orders, shipping is $4.

International orders will have to pay shipping, duties and fees.

What is your return policy?

If you decide you'd like to return your Slate product, please contact us at to initiate a return within 30 days of purchase. We offer a full product cost refund (less a $7.99 shipping label cost) within 30 days of your purchase.

We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and we will send you a prepaid return label. Once your return is received and inspected, we will send you an email to confirm the status of your return or exchange.

What size batteries does the Flosser use? 

The Slate Flosser fits AA batteries. The brands that fit best are Duracell, Kirkland, or Sam’s club. Rechargeable batteries unfortunately do not fit. However, we are currently working on a rechargeable Unit that should be available in 2025

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