There ARE many methods and products for line cleaning.
Some products clean, some polish and renew floatation and some accomplish both. I have used many over the past thirty eight years (yipes!)
and most work well and as stated, and is more often than not is personal preference as to how much time and money you have to invest. Time is typically a bigger issue because some products clearly state 'allow to dry 24 hours.'
This season I have been using the new RIO
Cleans and polishes. Very good product. Quick, easy, afforadle and readily available.
Loon Linespeed is, from my experience a very good product.
I have found that using 'make-up rounds' is a very effective applicator for any cleaner/polish.
Available in the womens cosmetics department they are just abrasive enough, very affordable and disposable; work well.
Bottom line: whether you use a dish detergent and or a cleaner polish....anything works better than nothing and this is one aspect of effective line control and presentation that is frequently overlooked.
Hope this helps.