Question

Why did griffin wish to reverse his invisibility treatment ?pwhy did he fail in his attempt

Answer 1

Griffin realises that there are many disadvantages in being invisible and his initial happiness of having this power, was longer in him. 
When more people got to know of Griffin and his invisible nature, people became overcome with fear. Griffins meets a former college professor (Dr. Kemp) and assumes that Dr. Kemp, will assist him. However Dr. Kemp reads about Griffins actions in newspapers and betrays his trust. He is caught and killed, and then Griffin becomes visible again. 

Answer 2

Griffin has a 'vision' earlier what invisibility may mean. He ventured into may actions and activities as an invisible man, but within a short span of time he realizes that being invisible was a constant conscious effort which drains all his excitement and adventure out and ultimately he can see the drawbacks of being invisible.  The extra care that he has to take to avoid crowds, his bare cold body, his hunger and discomfort, fear of being detected by dogs and people noticing his muddy footprints, all make him tired of being invisible and he wants to reverse his invisibility. He gets his books back and got the equipment that he would need, but the people of Iping interfered in his plans and he grew angrier and angrier complaining why they couldn't leave him alone. He confides in his friend Kemp, but is betrayed and ultimately dies. It's truly said that what we sow, we reap. He stole his father's money to complete his experiments and resorted to many unfair practices at the very beginning of his inception of this idea and his wicket ways couldn't have yielded any good.