---
title: "Cleaning an Induction Hob Without Scratching It"
description: "How to clean glass hob without scratching: what comes off, what does not, and why pan bases cause most of the marks."
url: "https://la-cornuemiami.support/blog/cleaning-a-glass-hob-without-scratching-it/"
date_modified: "2026-09-03"
Category: "Maintenance & Prevention"
---


# Cleaning an Induction Hob Without Scratching It

## How to clean glass hob without scratching: the honest answer first

La Cornue's own guide addresses this in two sentences, and they are worth having verbatim before anything else:

> Marks from mineral deposits from water or food can be removed with a cleaning cream. However, tiny scratches are not removable but will become less visible in time as a result of cleaning.

So: deposits come off, scratches do not. Nothing in a bottle changes that, and anybody promising otherwise is selling something.

Which is why the guide's actual advice is preventative, and why it names the cause directly: *always use the cleaning methods recommended in this guide, and make sure that the pan bottoms are smooth and clean.*

Most of this page is therefore about pans.

## The routine

**Let it cool.** A hot hob bakes cleaner onto itself, and anything wet on a hot surface is a thermal risk. If the display shows **H**, the zone is still above 140 °F — that indicator exists for exactly this moment.

**Get the grit off before you rub anything.** A dry or barely damp cloth first. The great majority of fine scratching is grit trapped under a cloth rather than the cloth or the cream.

**Ceramic hob cream, in straight passes.** A dedicated cream on a soft cloth. Straight lines rather than circles — partly because it works better on baked residue, partly because any fine marking that does occur is far less visible in a straight line than as a swirl catching the light.

**The plastic scraper for anything burnt.** The scrapers sold for ceramic hobs, held at a shallow angle, on a cool surface, only where a cloth has failed. Not a metal blade: it will lift burnt sugar and it will also find grit and drag it.

**Buff dry.** Cream residue left to dry is what produces the streaks people then attack with something stronger.

## The pans are the whole story

Run your hand across the base of each pan you use on the induction zones.

**Rough, pitted or sandy bases** are the abrasive. Cheap multi-ply pans that have warped, cast iron that has developed a rough casting surface, anything that has been used on a gas burner and picked up scale — all of them grind against ceramic glass every time they move.

**Sliding rather than lifting** is the action. It is instinctive with a heavy pan and it is what scratches. Lift, particularly cast iron.

**Dirty bases** carry grit from a counter or a sink onto the glass.

There is a second reason to care, beyond cosmetics. A pan base below the minimum diameter for its zone will not couple to induction at all — the published minimums on these cooktops are 4¾ inches at the front left, 5½ at the rear zones and 8¼ at the center. So the pans you use well on this hob are heavy, flat, clean and large enough, and that is the same list that keeps the glass unmarked.

## Sugar, immediately

The one spill with a deadline. Sugar and anything sugary bonds to ceramic glass as it cools, and once it has set, removing it means a scraper and pressure — which is precisely the situation that produces damage.

So a sugar spill gets dealt with **while the zone is still warm and the sugar still soft**, with a scraper at a shallow angle and care about the heat. It is the one exception to letting the hob cool first, and it is worth the exception.

## What South Florida adds

Hard water. Every boil-over and every wiped-down surface leaves mineral behind, and the next heating cycle bakes it on. Over a year that becomes the cloudy, faintly iridescent film people take for damage.

It is not damage and the cream takes it off — but the easier answer is a wipe when the hob is cool after cooking, every time. Ten seconds against half an hour later.

## When it is not a cleaning question

**A fingernail catches on the mark, and there is a rust trace or a change in the sound the hob makes.** That is a crack, not a scratch, and it is a safety matter: La Cornue's instruction is to disconnect the cooker immediately from the power supply and not use it until it has been repaired, because the glass is what separates the coils and electronics from anything spilled on the surface.

**The hob is cutting out under load** and showing **E2**. That is the electronics overheating, and the maker's first suggestion is ventilation rather than a part. Cleaning is not the answer and neither is resetting it.

Both of those have their own pages here, and both are worth reading before anybody puts a cloth away and forgets about it.

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