You need to find a better brand or supplier over the year I have my fair share or equipment failure, I just made the effort to find better.
When it comes to husbandry you have a few choices, provide a safe environment and mount the supply the way it should (meaning a probe must be directly secured on the UTH if using a UTH) or you can do it your way and possibly put your animal's health in jeopardy.
Ultimately YOUR choice.
The last option is to use a CHE or heat lamp outside the enclosure (because a lamp should never be in an enclosure with a snake even with a cage), that will require simple modification, hole in the top of the enclosure, mesh and the bulb will have to be recessed not laying directly on the mesh top)