sidis, if your kit is always inside, never outside or in humid areas….i would not lube the tuning rods/lugs at all….unless they became extremely difficult to turn. If those do get lubed, they tend to back off too easily and the drum will lose the tune. Not sure if your kit has them or not….but DW is about the only company that uses fine pitched threads on those rods….like 50/inch. It gives you more infinite tuning but it also takes more turns to tighten those down. Be careful with those and be sure they’re squared up before torquing those down. Almost every other drum company uses standard threads, so if you lose a DW true pitch rod do not grab a standard rod by accident to replace.
Now hardware like the kick pedal or high hat stand….absolutely lube those mechanisms per DWs recommendation on lube type.
I believe your DWs are finished with a clear coat….so a microfiber rag and a detail spray (something like mcguries quick detail spray) would be just fine. If you really want to get snazzy, you could add a carnuba wax occasionally.
Cymbals can be polished….however, some come out of the factory with a coating on top. You cannot polish those, just wipe them down. Personally I do not polish cymbals….just a wipe clean occasionally. The sound will darken slightly over time. My zildjian K Custom Brilliant ride has darkened and it sounds better now than when I pulled it out of the box.