I done the same, used long nose pliers and turned the screws out that way, it takes a little while but once they are out you can replace them with regular screws. I used the screws that held the maf housing to the air box (didnt need them as I fitted a jetex cone)
To clean the maf i used CRC Maf Cleaner comes in a little spray aerosol little bit more expensive then the electrical cleaner at £9.99 but done the job well.
To clean the maf i used CRC Maf Cleaner comes in a little spray aerosol little bit more expensive then the electrical cleaner at £9.99 but done the job well.