For trigger tuning use SMOOTH-KOTE and BP2000 Powder

Using these two products together, friction is reduced by 20% compared to oil. This fact becomes important if your trigger is already light (1-4 lbs. range).

You may not want to lighten it any more. If this is your case than use the SMOOTH-KOTE on its own. Simply apply SMOOTH-KOTE to the clean residue free surfaces of the hammer, sear and any other moving parts. Then check your trigger pull.

If you decide you want it lighter, apply BP2000 Powder on top of the SMOOTH-KOTE. SMOOTH-KOTE is a proprietary mix of the best available dry film lubricants in fast drying, residue free alcohol.

The alcohol carrier provides cleaning action then evaporates, allowing the lubricants to bond to the metal's surface. This bonding assures long-lasting effectiveness. BP2000 Powder is a specialty dry powdered lubricant. SMOOTH-KOTE and BP2000 Powder are designed to work together. BP2000 Powder not only has an affinity for bonding to metal it also bonds to SMOOTH-KOTE. This pair of self-cleaning products gives metal a grime-reducing non-stick coating so dirt, residues and fouling are easily removed.

TUF-GLIDE should be used on those firearms which have very light custom triggers such as benchrest/precision rifles and competition firearms in general. What you need on these triggers is a lubricant, which will protect the trigger parts from wear and corrosion. TUF-GLIDE and even TUF-CLOTH are great products to use.

If you are able to completely disassemble the trigger you can use TUF-CLOTH to wipe all the surfaces. Use TUF-GLIDE on the hard to reach surfaces and wipe off any excess with TUF-CLOTH or a clean dry rag. HI-SLIP GREASE is great to use on GLOCK and similar triggers.

Use it on any trigger with high load bearing surfaces rather than the sliding action seen in hammer and sear triggers. HI-SLIP GREASE reduces friction, eliminates wear and protects from -65°F to 600°F. This gives you self-healing protection with no migration or "spreading" problem. It stays right where you put it.

 More specific instructions can be in this PDF document.  Smooth-Kote / BP2000 / Hi-Slip Grease instructions.