One of the tools I get asked about most often is the car dent puller. They're an incredibly useful way to dip pieces in glaze, especially if you don't have a huge container of glaze. They do have limitations and won't work for everyone, but if they make sense for your glazing situation then they're irreplaceable. There's a full guide to using them on my blog - https://www.oldforgecreations.co.uk/blog/using-a-car-dent-puller-to-glaze-pottery. If you've tried one and it kept dropping pieces, then