problems with some of my MVS carts, need some help

Ok, so i bought 2 MVS carts off an EBAY seller. They were World Heros Perfect with fake label and Samurai Showdown 2 orginal label. When i put Samurai Showdown 2 in my CMVS 1-slot, i get the lines of death across the character boxes and along the background. Ive tried it multiple times and get the same effect. My other games work perfect though, this cart does look kinda dirty too, there an easy way to clean them? and my World Heros Perfect i think may be a boot. The sound in the Neo Geo intro sounds a little distorted and some of the characters get really messed up looking during battle. like half of them will turn into pixel boxes or some weird shit. Is this a boot? or another dirty cart? i can take some pictures of the carts if you guys like and maybe take some pictures of what the game looks like when it messes up.

EDIT: Ok, so i fuckin blew on the SS 2 cart like old school NES days and it kinda worked better, like i had perfect picture but i still had a few glitch looking spots here and there. but here are some pics of what it looks like when its fucked up, sorry for the large images:

Deep Cleaning Method:

1. Open up the cart and remove the PCB's.
2. Take a Cloath soaked with Alchohol and Rubb the conctacts clean.
3. Spray WD-40 on the contacts and wipe off.
4. Put back together.

Quick Cleainging Method:
1. Take a Qtip (Fat Baby QTIP is recomended) dipp it in alchohol
2. rubb it onto the contacts until it stopps making it dirty
3. Use another QTIP to dry the contacts.

A good substitute for Alcholhol in step#1 of the quick method is Purell or a similar hand sanitizer.

J. Yao Carts should Always be cleaned before you insert them into you system.....

If else Fails....Try some fine grain sandpaper on the carts connectors(it may be just that dirty),then Alcohol to clean off grime..

Otherwise..try pulling the cart out of the motherboard slightly..
It may be to far in..