How to clean the sheets in Between Light & Shadow

About Between Light & Shadow: Chapter I – Dawn, from BoardGameGeek:

Between Light & Shadow is a complex solo game full of adventures, tales and brainburning mechanics. Combine, manipulate, and place your dice skillfully, use your equipment and resources smartly and choose wisely on encounters and each of your tasks. Each chapter can be played separately or as a coherent campaign, each offering different mechanics and new challenges. In this first chapter of the game series, you have to stop the servants of the Shadow trying to bring back their master in various scenarios. Or experience the whole story through the eyes of different characters in the chapter campaign, where each of your decisions along the journey changes the world for the next sessions. While having this world-changing legacy element, you don't have to destroy any material and can reset the game anytime you want.