If you screw it up badly enough....you may have a very difficult time to find a technician who will even touch it.
Even if you do not screw it up, what ever you can do yourself will be so trivial for a professional that it will be included in the fee for the complete service.
When I did clock repair work, I'd estimate very differently for anyone who told me they already tried fixing it... and VERY differently for anyone who brought parts in a box.
There are some "home remedies" that are not trivial. One example is use of WD-40. That ruins cleaning solutions making re-use (normal business practice) impossible and increasing the cost of a repair proportionally. Another is loss of small parts... which a synchro Compur has many of.
John's right, of course... but think about the construction of a TLR: the two lenses are physically isolated in separate chambers. Having the lens cleaned might be a good idea anyway, but it seems like the risk of infection is limited.