i submerge everything before , let it dry still work like before 

yup i wash everything , but for sure let it dry first before connecting it back

you can soak it in warm water but make sure you fully dry the atty before putting it back into your mod. putting it under hair dryer also helps

Atty = Atomizer, meaning the whole tank

I usually take apart everything. The bottom part with the 510 connection can be washed no problem. Just wipe it dry, blow into the hole and make sure everything dry. The glass tank can also be separated so that you can wash the juice stuck inside. For me, I just wash in the sink and run through then smell if any juice left over. If no smell then its ok already

For the rba , i take out the cotton and wash 

I dismantle the OCC and wash the bottom part , rinse with hot running water and then let it air dry for a day.  So far, no issue.

Vaporshark RDNA 40 - RM730
SX Mini M class - RM730

Your subtank mini is perfect. Get a dripper ! (clone is okay. Price range 35~80)

VS RDNA40 - Evolv dna40 chip (temp. control and stuff)
SX Mini M Class - SX350J chip (tempt control, Joule Mode !!!!!, and more stuff - haven't try to play around with it only touch it je)
Maybe you can try youtube review for this two mods.
#IMO RDNA40/ SX350J - you can vape consistent at any watt with any amount of battery compare to mechanical mods

Well in term of both chip, i am not sure either !
Pisang goreng cheese for month April now is SX Mini M Class of course. Since VS is the hot cekodok last month.

Mechanical mod, as usual - Once your battery is fully charged, your mod will fire at rate 100% (p/s - some tolerance there). As time and vaping goes, your battery start to decrease its capacity and then your firing will be decrease too. But yeah, many of the sifu/otai maintaining using mechanical mod. IMO best pair with dripper (again it is very subjective)

Currenty setup :

Box mod + subtank mini = flavour wise + not-so-chunky-clouds (depends on what is your setting - i love the flavour in subtank)
Mech mod + Dripper = Chunky clouds and intense flavour

Actually both vapor shark rDNA40 and SX mini are good mod. I placed my order of rDNA40 at first but get legadgets to swap with SX Mini M class while my friends remain with rDNA40. In terms of weight, rDNA40 is way lighter but SX Mini feels so rock solid in hands. SX Mini has more settings to play with especially the 4 modes: soft, standard, powerful and powerful+. This is the main reason I choose it as with some eliquid, I like to use with powerful+. The boss of legadgets told me SX mini outperformed rDNA40 in every single function and he is using one himself. Another is wattage 40 vs 60. Yes battery is fuzzy to replace but when used to it, not that troublesome. Another cool feature is the gravity sensor by tilting left and right (u can use the up n down buttons too). And also auto flip the screen Left or Right!

mech mod :

praxis, chi you, nemesis, nzonic, caravela (haha taking about clones here), many more to list

no problem with subtank mini pair with mech mod.
Just dont use those OCC. Confirm burnt within few minutes, use the RBA part and good to go.

1 mech mod is enough for some time. Still keep my K100 in car for emergency usage and another Chi You for flavour testing purpose

Just get clone mech mod, below RM100 can get decent ones

Why not get the Smok M80? It has both wattage & mech mode

mech is much more simple actually , just that the safety feature are less than vv/vw since there is no chip etc to protect the batt

500-600 i think authentic ipv 2 mini is good enough 
But still im not into vv/vw mod i only know mech mod 

For subtank better stick to electronic mod , i would say mech mod max performance only come when you go for subohm on dripper    and thats only for cloud chasing

ipv4 slightly bigger with joule control
sig 150w - additional 50w

magnet door vs slide cover

looks ? be your own judge for it