Does anyone else have trouble using this stuff? I have noticed so has my husband that if we use that gel after I complain of burning pain, but when he first uses it on me it certainly doesn't do anything at all, I don't feel any effect that its meant to do such as actually warm anything up, he's noticed this as well, but after about 15 minutes it starts feeling like I am sat on the cooker with the burners on full and the pain is terrible, hence why its now gone in the bin and we are back to using olive oil again for me.