FAQ Page

How long does a floss head last?


Slate floss heads are reusable (like your toothbrush!) just rinse & dry after each use, and change out weekly.

Those with tight teeth might need to change them more frequently.

Those that floss more casually might not need to change them as much!

How long will a box of refills last?

20 WEEKS! (4 to 5 months)

If you have tighter teeth, you might want to order every 3 months.

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.

TOXIN FREE! No PTFEs, PFAS, wax, or chemicals!

Nano-hydroxyapatite - what is it?

Ethically sourced from 5% nano, nHa is a natural mineral that has remineralizing effects on enamel. We use this as a natural substitute to fluoride! It helps combat the negative effects of demineralization.

Is it safe to use on crowns?

Yes! Here's a great blog post about why using the Slate Electric Flosser is perfect for crowns and veneers:

Are there any coatings or flavorings on the colored floss heads?

The grey, pink, green and royal blue braces floss heads do not have any flavors, are not coated and don’t contain any chemicals.

They are ultra-high molecular weight polyethylene, and they are teflon-free.

The light blue classic floss head has all natural nano-hydroxyapatite to help restore your teeth’s enamel.

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

The Slate Electric Flosser cannot work with a permanent retainer at this time. You can 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 support@slateflosser.com and we will exchange your button or product free of cost.

Is Shipping Free?

We offer free shipping on all floss head subscriptions and orders over $49.99 in the United States.

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

What is your return policy?

30-day money back guarantee!

Slate offers a 30-day return policy on your initial order, which means you have 30 days after receiving your item to request a return. To be eligible for a return, you will need the receipt with the order number or proof of purchase.

To start a return, you can contact us at support@slateflosser.com. If your return is accepted, we’ll send you a return shipping label and instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.Opened Floss Head packages are not eligible for a return.

Floss Head Refills cannot be returned.

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.

We are currently working on a rechargeable unit that should be available by the end of 2024!

Contact Us

Have more questions? Contact us, we would be happy to help you!