What have you tried that has not worked? Any of the above suggestions? My collection has worked without fail for so many Talmididm. very few individuals have tried it for real and have not succeeded. most who really followed it all have been opened!
Also, in this weeks parsha we see a connection between kedusha and kashrus. Are you careful with the hechshairim of what you put ion your mouth? Rav Akiva Eiger once told the paretn of a child who did not enjoy learning that he must have eaten treif……and once he did teshva, his geshmak followed.