In warm weather mix up a bucket full or whatever and then rinse off your front end loader arms, front of tractor or whatever has concrete on it. If it matters to keep stuff sort of clean. Then mix your next batch. Keep a scrub brush handy and do not wait till the end of the day. Especially in warm weather. Corners of the bucket will hold concrete thats not mixed well so keep a eye on them. Remember concrete gets hard under water, so you cannot fill bucket with water and come back and clean later [emoji28]