original halogen ceiling spotters in 2000 lxi--recessed

[luckyron1]

The (poorly designed) original, disc shaped, recessed lites have so-
called 'friction secured' lens enclosures which are overly sensitive
to the high temperatures of the 10 watt halogen bulb. BB admits that
when the lights have been on for awhile, the heat build-up causes
the lens enclosures to expand and then separate from the light
housing and fall to the floor. Eventually some of the lens
enclosures will no longer secure, having lost their 'friction.'
Apparently, BB didn't pressure the vendor to correct the problem and
in fact the vendor no longer makes this particular unit. So,
certainly not in the best interest of it's customers, BB went around
the problem by using one about 3 mm larger in diameter with a
locking twist on lens enclosure, which I'm told, did solve the above
problem. Of course, that doesn't help it's customers stuck with the
faulty originals. I could now replace all 32 of my originals (in
order to match) with the new ones and drill the holes a little
larger but I'm not about to risk ruining the vinyl type ceiling.
So, I'm back to solving the problem with the original lites. I'm
thinking along the lines of some kind of a soft and tacky, NON-
FLAMMABLE, glue/putty type substance, that would secure the lens
enclosure to the light housing, but also allow us to remove it
if/when we needed to replace a bulb. Any suggestions appreciated
and thanks in advance for your help.