De'Longhi automatic household coffee machines do not require descaling tablets for cleaning because their design and integrated cleaning cycles are specifically engineered to prevent the buildup of coffee oils and residues that would necessitate such tablets in other brands.[1] This approach is rooted in several design choices and technological implementations.

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Firstly, De'Longhi machines often incorporate advanced brewing units that are easily removable and washable under running water.[2] This allows users to manually clean the most critical component where coffee oils accumulate, preventing them from hardening and requiring chemical dissolution. Many other manufacturers integrate fixed brewing units, making manual cleaning difficult or impossible, thus necessitating chemical cleaning agents like descaling tablets to break down stubborn residues.[3] Secondly, De'Longhi's internal cleaning programs, such as the "Rinse" and "Coffee Circuit Cleaning" cycles, are designed to flush the system with hot water at regular intervals, minimizing the accumulation of fresh coffee oils and preventing them from becoming encrusted.[4] These cycles are often initiated automatically or prompted by the machine after a certain number of coffees or a period of inactivity. This proactive flushing is a key differentiator. Thirdly, the materials used in De'Longhi's internal components, particularly those in contact with coffee, are often chosen for their non-stick properties and resistance to oil adhesion.[5] This further reduces the likelihood of significant coffee oil buildup that would require aggressive chemical cleaning. Finally, the focus of De'Longhi's maintenance is primarily on descaling (removing mineral deposits from water) using a liquid descaling solution, rather than degreasing with tablets.[6] While both are crucial for machine longevity, the absence of a tablet-based degreasing program indicates a successful design strategy that mitigates the need for such a specific cleaning agent. The company's official stance and user manuals consistently emphasize liquid descalers for mineral buildup and manual cleaning of the brew unit for coffee residue, without mentioning or providing a program for degreasing tablets.[7]