This is how to effectively and quickly clean a typical glass Meth pipe:The following only works for pipes with a bowl hole of around 1 cm or whatever size you can work with.
Pour a little of the milky abrasive cleaner
Jif or Jiff (Aus) or
CifWiki (it is sold under the names Jif, Vim, Viss and Handy Andy, depending on which of the 51 countries it is sold in) into the bottom of the bowl.
Cut out a 1 cm square of a pot scouring pad out to be used to fit into the top of the bowl.
Put the above square into the bowl (on top of the Jif/Cif) and get a wooden skewer or a chopstick to insert on top of the pad and start cleaning gently !
When you have cleaned the inside of the bowl then use the skewer or chopstick to get the pad out and then clean the outside of the bowl with it and your fingers.
I also cut thin strips of the nylon pot scourer so that i can use it to clean the stem and even the bend but but make it small so it doesn't get jammed, however, in all my years I have never had it jam too bad.
you can also use the blunt end of the skewer to clean the stem, just as long as you use that abrasive cleaning compound (like a coarse toothpaste).
Rinse with hot water and dry with a tissue.