Regarding the cleaning efficacy of the Portable Deep Cleaner, the bristles on the fabric cleaning brush are designed to be dense and firm. Please be aware that intense cleaning could remove fibers from delicate fabrics. Please avoid using this brush on fragile or valuable items.

Additionally, it is recommended to clean the brush head after each use. This method will help prevent the buildup of debris and reduce the likelihood of future maintenance issues.

If you have any other questions about the E28 robot, please don't hesitate to contact eufy Support Engineers for further assistance.