Chronic wounds create poor health (e.g. infection and immobility) and personal issues for patients (e.g. malodour, pain and sleepless nights), as well as substantial costs to healthcare systems (Guest et al, 2017; Atkin et al, 2019). They present many clinical challenges, but two key areas are wound bed preparation and exudate management (Atkin et al, 2019), which are intrinsically linked. A chronic or cavity wound bed which has not been prepared for healing through cleansing and debridement (Mahoney, 2020), containing slough, necrotic tissue or wound biofilm, usually produces a high volume of exudate (World Union of Wound Healing Societies [WUWHS], 2019).