Cut out all dead and diseased stems with hand pruners. Cut back to healthy wood. Always discard diseased plant material by bagging and setting out for collection.
Thin a tangled mass of vines by removing branches that cross each other or are crowded. Healthy plant debris can be placed on the compost pile.
Attach stray vines to trellises and fences by gently winding them through the structure. You may have to loosely tie some stems to trellis members with jute twine to keep them upright. The vine will quickly secure itself by growing through the trellis.