Henry- I've been testing the GL 70/30 for quite some time and am finding I am needing to wick down quite a bit from what others have been using- I'm testing in thick glass tumbers (2 inch diameter) and have found LX14 to work pretty well and have even gone down to an LX12 on lighter scents. I started out with the LX18 and 20 because of what others found were working for them but the jar got way too hot the further down it burned. I do get some hangup but it always manages to catch up. I'm still testing different wicks. I'm using an HTP52 in a Celtic Moonspice (an oil that is on the heavier side) tester and am getting great results with that though I have only burned down about half way. Is the LX24 the only wick you've tried in this jar so far? I would suggest going down a size or two.
I found these though they aren't all green:undecided http://www.orientaltrading.com/application?namespace=browse&origin=searchMain.jsp&event=link.itemDetails&demandPrefix=12&sku=6/1385&mode=Searching&erec=0&D=plush%2Bmonsters&Ntt=plush%2Bmonsters&Ntk=all&Dx=mode%252bmatchallpartial&Ntx=mode%252bmatchallpartial&y=0&N=0&x=0&sd=PLUSH+MONSTERS