What often disappears from its partner after spinning around in heat and suds?

I can promise the world, but often come with a heap of unexpected problems and a budget that never holds. Solve the riddle → Though I carry many, I am often filled with silence. My short journey can feel long, especially on Monday mornings. Solve the riddle → Many avoid me, but most get me sooner or later. I am often small, but can cost you dearly. Solve the riddle → What is it that grows in secret and promises a weekend of sorting and folding? Solve the riddle → What first appears the day after, takes over your muscles, and refuses to move out? Solve the riddle →