Clean the glass with a ceramic scraper and cream cleaner, then do the stainless surround along its brushed grain rather than across it. Asko finishes are premium and unforgiving, so nothing abrasive touches the metal at any point.
Asko hobs are Swedish design under the Gorenje group, sold at the premium end, and the surfaces are the consideration rather than the technology.
The surround, not the glass
Standard glass care handles the cooking surface: cool, wipe loose material away, ceramic scraper at a shallow angle, cream cleaner, buffed dry. Our cooktop cleaning guide covers it.
What is particular to an Asko is the surround. Where the hob is framed, that frame is brushed stainless of the same quality as the Pro Series appliance fronts, and it carries the same rule: work along the grain, never across it, and use nothing abrasive.
Cream cooktop cleaner is correct on the glass and wrong on the stainless. It is a mild abrasive, which is exactly why it works on baked residue, and on a brushed metal frame it dulls the finish. Use a separate cloth and warm soapy water for the frame, and keep the cream cleaner strictly on the glass.
That distinction is the single most useful thing on this page, because the two surfaces are within an inch of each other and one product looks like it should do both.
Induction dominates the range
Most current Asko hobs are induction rather than gas, so this is a glass and metal job rather than a burner job. If yours is gas, the trivets and caps take the usual approach.
Dry it
Brushed stainless holds water spots in the grain rather than on the surface, and most Sydney water leaves them readily. Dry the frame after cleaning rather than letting it air.
The controls, and what they are printed on
Asko induction hobs put their controls on the glass rather than on the stainless, which is fortunate, because the glass tolerates a great deal more than the frame does.
They still lock out when wet. Moisture on the panel triggers phantom touches and the hob protects itself by refusing input, which reads as a fault and is not. Dry the control area deliberately after cleaning rather than letting it air, and give it a few minutes before deciding anything is wrong.
Nothing abrasive crosses the controls either. On models where the markings sit on the surface rather than beneath the glass, a scourer wears them away permanently, and a hob with unreadable controls tends to get replaced rather than repaired.
What actually goes wrong
Cream cleaner used on the stainless frame, which dulls it permanently.
Working across the grain, leaving swirls that cannot be selectively removed.
Water spotting, from letting the frame air dry.
Should you do it yourself?
Do it yourself, with two cloths and two products.
Get someone in if the frame has already dulled, or alongside the Asko oven below and the Asko rangehood above.