cleaning babies neck folds

Okay mamas I bath my twin boys every evening as well as do spot checks throughout the day and i ALWAYS seem to miss something in their little neck folds - and it seems like one of my boys is getting a little sore looking in one of his neck folds 😞 what are some tips and tricks to getting in between them and making sure they are nice and dry. Also what is good to apply to their necks. I currently use aveeno for babies and just put a bit of Vaseline in there last night. Any help would be great. Thank you